By what is the nuclear energy primarily generated

A．People evacuated from their homes can return now.
B．Hood waters are receding in all parts of the upper mid-western United States.
C．Flooding is expected to continue for a few more days.
D．There was a record snowfall last year.

A．held confirmation hearing for Mr. Perrey
B．may have to decide whether to impose sanctions on North Korea
C．made discussions on whether to deploy Patriot Defense system to South Korea
D．made discussions on whether to deploy a single nuclear device to South Korea