Help needed! I looked through my SS book already, but it didn't help. So what makes more sense to me, is the answers, A or D.

Question

1.What was North Korea’s response to President George W. Bush’s 2001 threat to stop negotiations?

A. North Korea immediately gave in
to his list of conditions.

B. North Korea resumed its nuclear
program.

C. North Korea sought the help of
the United Nations.

D. North Korea finally joined the
Non-Proliferation Treaty.