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 本题B错的一个解释是like exercise放在句中有歧义，可是后面都已经加了and，怎么可能再去和后面的句子作对比呢？ 况且A中just as exercise does也是放在中间和B结构一样的