Sentence Correction

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 mangotrees;
and indirectly help produce
(B) pollinating banana, breadfruit, andmango trees;
and indirectly helping to produce
(C) pollinatingbanana, 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

OA: B

I don't understand the E's explaination in OG: Although this version maintains parallelism throughout... I don't see the parallelism(it uses "pollinate", not pollinating)

Awesome discussion -> https://gmatclub.com/forum/tropical-bats ... 31457.html