Parallel construction; use of "to" before & after "and"

Tx for your repsonses.

so let me try and understand it a bit differently; pls the case in which we are supoosed to repeat the "to" after the "and" . . .

the original sentence is an exampleof comma splice....so b is best

Unreasonable weather in the months before a wine harvest can cool vineyards in the Bordeaux region enough to affect the overall size of the grapes themselves, create unwanted moisture that can cause mold in some grape varieties and deterioration in others

A) to affect the overall size of the grapes themselves, create
B) to affect the overall size of the grapes themselves, and create
C) That the overall size of the grapes themselves are affected, create
D) that it affects the overall size of the grapes themselves, creates
E) that the size of the grapes are affected and creates

Out of the 5.... C,D,E are anyway out as we need an infinitive.... hence left is A and B..

If u notice..... 'create unwanted moisture that can cause mold in some grape varieties and deterioration in others' is not parallel to the 'affect the overall size of the grapes themselves'. Instead it follows it in sequence. Hence you don't need these clauses to be in parallel. Rather you need a subordinate / conjunction to give a follow essence to the same. Hence in B it uses ', and create'. This suffices the need and hence it is correct!