When Pete Seeger appeared before the House Un-American Activities Committee in 1955, he refused to answer the committee's questions about
his personal beliefs. He based his refusal on:
A. the Fifth Amendment, which says you can't be forced to testify
against yourself.
B. the Sixth Amendment, which guarantees a speedy trial by an
impartial jury.
C. the First Amendment, which guarantees freedom of speech.
D. the Fourth Amendment, which guards against unreasonable
search and seizure.

The First Ammendment, which guarantees a person the right to free speech.

Explanation:

The reason he based his refusal on the First ammendment is because he wanted them to know that he was entitled not to answer their questions. That meant that he could also say nothing because it was his will not to speak at all.

the sculpture i am pretty sure you are talking about is the statue b. the david statue now lives in the galleria dell'accademia, florence, italy. it was made by ‎michelangelo.

artists followed a set of rules to achieve ideal proportion.