Which sentence could effectively be placed in a summary of Chapter 4 of Wheels of Change because it expresses a key idea objectively?

In the 1880s and 1890s, female bicycle racers faced a variety of opponents, including males, horses, and an occasional dog.
Some women foolishly pushed themselves to unbelievable lengths, sustaining a multitude of injuries just to be victorious.
Women preferred racing on the East Coast and in the Midwest because these areas were filled with kind people who supported them.
Had I been alive at the time, I would have supported women for their courageous and competitive efforts in bicycle racing.

The statistic in the last sentence helps develop the idea that bicycle racing was a popular sport in the 1880s and 1890s by showing that

the success of the first cycling periodical in 1877 quickly led to the publication of many more cycling magazines.
the rapid increase in publications about cycling was directly responsible for Americans’ growing interest in bicycles.
Americans became interested in cycling around the same time that the publication industry began to flourish.
Americans’ fascination with the bicycle influenced the rapid growth that occurred in the publication industry.