作者：英吉
Adult female rats who have never before encountered rat pups will start to show maternal behaviors after being confined with a pup for about seven days. This period can be considerably shortened by disabling the female's sense of smell or by removing the scent-producing glands of the pup.
Which of the following hypotheses best explains the contrast described above?
(A) The sense of smell in adult female rats is more acute than that in rat pups.
(B) The amount of scent produced by rat pups increases when they are in the presence of a female rat that did not bear them.
(C) Female rats that have given birth are more affected by olfactory cues than are female rats that have never given birth.
(D) A female rat that has given birth shows maternal behavior toward rat pups that she did not bear more quickly than does a female rat that has never given birth.
(E) The development of a female rat's maternal interest in a rat pup that she did not bear is inhibited by the odor of the pup.
题目分析：原文没太读明白，大概说的是老鼠的某种行为与嗅觉和pup之间的关系。A说成年磁性的老鼠嗅觉敏锐，显然原文没提过，杀。B说pup产生的scent在什么情况下会增加，没提，杀。C说雌性老鼠given birth的比从来没有given birth的更容易受到olfactory cues的影响，原文没说过这种比较，杀。D还是拿雌性老鼠given birth的和从来没有given birth的进行比较，原文没有提过这种比较，杀。E说雌性老鼠对pup的兴趣受到pup的odor影响，此选项一直谈的就是气味和pup之间的关系，原文也一直谈的是这种关系，留着。
