Thomas Hobbes left influence on political thought. He believed people were naturally selfish and evil. He also believed people should have equal rights and no one should have more power over anyone else.
C. FDR believed that the federal government should take an active role in the economy; Hoover didn't.
President Herbert Hoover is what we call a sitting duck president which means he didn't do anything and believed in a philosophy called "Rugged Individualism". Rugged individualism basically means it's every man for himself and Hoover felt that Americans should figure their issues out by themselves and not rely on the government to help them out.
As Bookworm83 pointed out already, C nor D couldn't possibly correct, also due to the reason that he was able to come up with the 14 point plan. However, the real answer to your question would be A - he was very shy.
The shyness of Woodrow Wilson has been readily documented in variou sources and is also the reason why it's th ecorrect answer. Overcoming something like shyness was not an easy thing to do for him.