26. Tropical bats play important roles in the rain forest ecosystem, aiding in the dispersal of cashew, date, and fig seeds; pollinating banana, breadfruit, and mango trees; and indirectly help produce tequila by pollinating agave plants.
(A) pollinating banana, breadfruit, and mango trees; and indirectly help produce
(B) pollinating banana, breadfruit, and mango trees; and indirectly helping to produce
(C) pollinating banana, breadfruit, and mango trees; and they indirectly help to produce
(D) they pollinate banana, breadfruit, and mango trees; and indirectly help producing
(E) they pollinate banana, breadfruit, and mango trees; indirectly helping the producing of
关于E的解释不太明白，OG13认为此项是平行的，错点在help的用法上应该改成helping to produce。
为什么这项是平行的呢？ they pollinate banana没有破坏平行吗？ 困惑呀~
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