The next five questions are based on this passage

In 1603, Queen Elizabeth I of England died. She had never married and had no heir, so the throne passed to a distant relative: James Stuart, the son of Elizabeth's cousin and one time rival for the throne, Mary, Queen of Scotts, James was crowded King James VI of Scotland, and the combination of roles would create a spirit of conflict that hunted the two nations for generations to come.
The conflict developed as a result of rising tensions among the people within the nations, as well as between them. Scholars in the 21st century area far too hasty to dismissing the role of religion in political disputes, but religion undoubtedly played a role in the problems that faced England and Scotland. By the time of James Stuart's succession to the English people had firmly embrace the teachings of Protestant theology. Similarly, The Scottish Lowlands was decisively Protestant. In the Scottish Highlands, however, the clans retained their Catholic fate. James acknowledged the Church of England and still sanctioned the largely Protestant translation of the Bible that still bears his name
James's son King Charles I proved himself to be less committed to the Protestant Church of England. Charles married the Catholic Princess Henrietta Maria of France, and there were suspicious among the English and the Lowland Scots that Charles was quietly a Catholic. Charles's own political troubles extended beyond religion in this case, and he was beheaded in 1649. Eventually, his son King Charles's II would be crowded, and this Charles believed to have converted secretly to the Catholic Church, Charles II died without a legitimate heir, and his brother James ascended to the throne as King James II.
James was recognized to be a practicing Catholic, and his commitment to Catholicism would prove to be his downfall. James's wife Mary Beatrice lost number of children during their infancy, and when she became pregnant again in 1687 the public became concerned, if James had a son, that son would undoubtedly be raised a Catholic, and the English people would not stand for this. Mary gave birth to a son, but the story quickly circulated that the royal child had died and the child named James's heir was a founding smuggled in .James, his wife, and his infant son were forced to flee; and James's Protestant daughter Mary was crowned the queen.
In spite of a strong resemblance to the King, the young James was generally rejected among the English and the Lowland Scots, who referred to him as the "the Pretender."
But in the Highlands the Catholic princeling was welcome. He inspire a group known as Jacoties, to reflect the Latin version of his name. His own son Charles, known affectionately as Bonnie Prince Charlie, would eventually raise an army and attempt to recapture what believed to be his throne. The movement was soundly defeated at the Battle of Culloden in 1746; and England and Scotland have remained ostensibly Protestant ever since.

Which of the following sentences contains an opinion on the part of the author?

a. James was recognized to be a practicing Catholic, and his commitment to Catholicism would prove his downfall.
b. James's son King Charles I proved himself to be less committed to the Protestant Church of England.
c. The movement was soundly defeated at the Battle of Culloden in 1746, and England and Scotland have remained ostensibly Protestant ever since.
d. Scholars in the 21st century are far too hasty in dismissing the role of religion in political disputes, but religion undoubtedly played a role in the problems that faced England and Scotland.