The word "enervated" in the first paragraph probably means ______.

A．sneering at the impending difficulties
B．cheering themselves up for the worst situation.
C．preparing themselves for the worst situation.
D．having a total disregard for the coming difficulties.

A．they are all clued up about climate.
B．they don't know much about climate.
C．they are probing into the field of climate.
D．they are uncertain of climatic phenomena.