单选题 Animals that are good sleepers ______.

A、 need to have a good sleep after they have exhausted themselves by getting rid of hunting animals
B、 need to have a good sleep after they get tired from hunting other animals
C、 are all mammals
D、 almost always have a safe resting place

【正确答案】 D

【答案解析】根据第三段中句子“Interestingly，the good…from their enemies”可知，能睡觉的动物都是有安全休息地点的捕食者，所以选D。其余选项都不正确。