牛人们，请看这个含有these的题

kevinjpcn

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.

• Ahot sauces stimulate the release of endorphins in the brain, just as exercise does, and these have a pain-relieving effect like morphine's
• Bhot sauces stimulate the release of endorphins in the brain, like exercise, and they have a pain-relieving effect that is like morphine
• Chot sauces and exercise both stimulate the release of endorphins in the brain, and they have a pain-relieving effect like morphine
• Dthe release of endorphins in the brain is stimulated both by hot sauces and exercise, and they have a pain-relieving effect like morphine's
• Ethe 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
  

我的天。这个题地正确答案居然是A。A有一个these，我第一个就把他排除了，最后勉强选择了B（虽然B看起来也不是非常好）
NN，为啥A里面的these正确呢，好像跟manhattan矛盾哟。

wangwei1128

These就近指代复数endorphins

B. that从句修饰effect