By what is the nuclear energy primarily generated

A．had been abandoned by the Mayas about thirteen hundred years previously
B．had been occupied and developed by the Mayas about thirteen hundred years before
C．had been deserted by the Mayas as soon as the Spaniards arrived
D．was conquered by the Mayas thirteen hundred years ago

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