I believe the correct answer is C, asserting that scientists should rely on experimentation and observation. He didn't prove that Earth revolved around the sun, Galileo and Copernicus did that. He didn't do anything with human anatomy that I know of, and Newton used math to prove ideas.
The reason why has to do with law, marriage and a family that disagreed with their patriarch's evolving views on slavery. Like nearly all wealthy landowners in Virginia, George Washington owned enslaved people who worked his land. He received the first enslaved workers of his own when his father died in 1743.
Answer:
1 hour and 10 minutes = 60+10 = 70 minutes for 4 miles then divide 70 by 4 = 17.5 minutes for a mile