"Late （late, late, late!)nights are the norm" （Para. 5)is closest in meaning to "______."A

"Late (late, late, late!)nights are the norm" (Para. 5)is closest in meaning to "______."

A．She works more efficiently at night

B．She often reads story books at night

C．She usually works late into the night

D．She normally mails packages at night

请帮忙给出正确答案和分析，谢谢！