The right answer is option D.With the advent of YouTube, Facebook, and Flickr, many savvy political consultants undertook revolutionary micro-targeting and get-out-the-vote techniques that enabled political candidates with cash-strapped budgets
to be able to reach numerous likely voters and succeed in raising
large numbers of money from enthusiastic and committed supporters in a short period of time.
(A) cash-strapped budgets
to be able to reach numerous likely voters and succeed in raising
large numbers of money
to be able is wordy and not concise. There is no need to add
to be able to sentence since to reach logically means to be able to reach. large numbers of money? No, it should rather be large amounts of money. Eliminate option A.
(B) cash-strapped budgets to reach numerous likely voters and
be successful in raising large amounts of money
Option B is grammatically correct. Let's keep option B for now.
(C) cash-strapped budgets to reach numerous likely voters,
succeeding in raising large amounts of moneyLogically, succeeding in raising large amounts of money modifies political candidates with cash-strapped budgets. It could also modify the subject of the sentence savvy political consultants. Option B is not as clear as options B and D. In addition, by not making the act of raising large amounts of money parallel to
to reach numerous likely voters, the sentence implies that the main focus of using Facebook, YouTube, and Flickr is just to reach out to potential voters and this is contrary to the meaning of the sentence. Eliminate option C.
(D) cash-strapped budgets to reach numerous likely voters and succeed in raising large amounts of money
Correct. Option D is parallel and more concise than option B. This is because the verb
succeed is more concise compared with
be successful. Eliminate option B and keep option D.
(E) cash-strapped budgets
to be able to reach numerous likely voters and succeed in raising large amounts of money
The same error in option A is present in option E although large amounts of money is rightly used in option E. Eliminate option E.
The best answer is option D.