Which piece of evidence in Passage 1 BEST explains what caused France to engage in many wars across Europe in the late 1700s and early 1800s?
a. Napoleon was almost master of Europe, creating new states such as the German Confederation of the Rhine and making his family members kings and queens.
b. In 1793, a group of European empires and kingdoms came together to fight against France.
c. He transformed his military victories into political power, becoming head of the French government and then emperor.
d. On December 15, the government decreed that the revolutionary laws of France including no more kings - were to be brought abroad by the French armies.