【单选题】Do you find getting up in the morning so difficult that it is painful? This might be called laziness, but Dr. Kleitman has a new explanation. He has proved that everyone has a daily energy cycle. Duri...
A.
Unawareness of energy cycles.
B.
Familiar monologues.
C.
A change in a family member's energy cycle.
D.
Attempts to control the energy cycle of other family member.