What Was the Focus of America's 2010 Nuclear Posture Review

What was the focus of America's 2010 Nuclear Posture Review?

A) The prevention of nuclear terrorism
B) Terminating the dissemination of nuclear weapons information by Pakistan and North Korea
C) Destroying the nuclear weapons turned over to the United States by Libya
D) Persuading South Korea not to undertake the development of nuclear weapons in response to North Korea provocations.