一个特例，大家注意

酱子啊

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

选A，但是A 是我第一个排除的。。搜了以前的讨论帖，看来任何的语法规则都不是放之四海而皆准的。。
考试的时候只能祈祷不要出现怪题了。。~~~~哈哈哈‘
放上来给大家看一下
these可以单独指代了，它这回就裸奔了。。。。
大家加油吧