prep07 Part2 SC34 求助各位兄弟姐妹~

Addicted潇潇

Besides adding complementary flavors to many foods, hot sauces stimulate the release of endorphins in the brain, just as exercise does, and these have a pain-relieving effect like morphine's.

(A) hot sauces stimulate the release of endorphins in the brain, just as exercise does, and these have a pain-relieving effect like morphine's
(B) hot sauces stimulate the release of endorphins in the brain, like exercise, and they have a pain-relieving effect that is like morphine
(C) hot sauces and exercise both stimulate the release of endorphins in the brain, and they have a pain-relieving effect like morphine
(D) the release of endorphins in the brain is stimulated both by hot sauces and exercise, and they have a pain-relieving effect like morphine's
(E) the release of endorphins in the brain is stimulated by hot sauces, just as with exercise, and these have a pain-relieving effect like that of morphine


这题答案是A 有个小小的疑问 A选项里morphine为什么要加所有格？是跟morphine的什么在比较呢？我看到PREP笔记上所有没加所有格的选项都被判定为比较对象不对等 我觉得挺对等的..."这些endorphins正如morphine一样有疼痛缓解的效用"不知道这么理解哪里不对呢？
还有就是B选项里的 like exercise 比较对象有歧义是什么意思呢？是说不确定exercise到底是和前半句归一类还是后半句吗？
我太笨了...非常期待各位兄弟姐妹的帮助