老师，请问这道题目正确选项为什么不选B 【catching and eating adult beetles】？我觉得B是错的，因为文章中说的：
Although ants are not big enough to kill or seriously injure grasshoppers, they drive them away by nipping at their feet.
既然不能kill，那就不能catching and eating adult beetles啊。那要选一个关于“ants defend morning glory plants from seed beetles"不对的，就应该是B啊。
Extrafloral nectaries at the base of each sepal
attract several kinds of insects, but 96 percent
of them are ants, several different species of
them. When buds are still small, less than a
quarter of an inch long, the sepal nectaries are
already present and producing nectar. They
continue to do so as the flower develops and
while the fruit matures. Observations leave little
doubt that ants protect morning glory flowers
and fruits from the combined enemy force of
grasshoppers, caterpillars, and seed beetles.
Bentley compares the seed production of six
plants that grew where there were no ants with
that of seventeen plants that were occupied by
ants. Unprotected plants bore only 45 seeds per
plant, but plants occupied by ants bore 211 seeds
per plant. Although ants are not big enough to kill
or seriously injure grasshoppers, they drive them
away by nipping at their feet. Seed beetles are
more vulnerable because they are much smaller
than grasshoppers. The ants prey on the adult
beetles, disturb females as they lay their eggs on
developing fruits, and eat many of the eggs they
do manage to lay.
B 选项偷欢了概念了。B说的是“ adult beetles”，但原文中说的“grasshoppers”。
个人感觉B选项对应原文的出处不是“Although ants are not big enough to kill or seriously injure grasshoppers, they drive them away by nipping at their feet.”，
应该是最后一句“The ants prey on the adult beetles, disturb females as they lay their eggs on developing fruits, and eat many of the eggs they
do manage to lay.”，所以B选项是对的。