Bunuel
Although they realize that retirement plan investing provides long-term benefits, many employees wonder whether they put too significant a financial burden on their short term cash flow.
A. Although they realize that retirement plan investing provides long-term benefits, many employees wonder whether they put too significant a financial burden on their
B. They realize that retirement plan investing provides long-term benefits, while many employees wonder whether it puts too significant a financial burden on their
C. While realizing that retirement plan investing provides long-term benefits, many employees wonder whether they are putting too significant a financial burden on their
D. Although they realize that retirement plan investing provides long-term benefits, many employees wonder whether it puts too significant a financial burden on their
E. While realizing that retirement plan investing provides long-term benefits, many employees wonder whether it puts too significant a financial burden on its
VERITAS PREP OFFICIAL SOLUTION:
This problem is a pronoun problem through and through: you should recognize this by seeing the "its" vs. "their" decision in the last word of each answer choice, the fact that choice B starts with a pronoun "they," and the decision between "it" and "they" after the word "whether."
The key in pronoun problems is determining the antecedent. For the last word of each answer choice, it should be clear that "employees" are the owners/possessors of the short-term cash flow (it can't be "investing" or "benefits," the other nouns earlier in the sentence) so you must have the plural "their." This eliminates choice E.
Then for the "they" in choice B, recognize that there is no clear antecedent ("employees" later in the sentence comes after the transition "while," suggesting that in this case the "they" has to refer to something other than those "many employees," and there just isn't another eligible noun in the sentence). This means that B is guilty of a pronoun reference error and is incorrect.
For choices A, C, and D, notice that in each choice you start with a word that signals transition ("although" or "while"), meaning that the clause after the comma has to refer back to that introduction. This means that the pronoun has to refer back to "retirement plan investing" and that therefore you need the pronoun "it" in "many employees wonder whether it puts..." With that, answer choice D must be correct.
Why can't "they" refer to "employees"? Consider the meaning of the sentence, which has that "although" introduction for a reason. If "they" were to refer to "employees," then the two components of the sentence would not directly relate to each other. If the sentence ended with "many employees wonder whether they put too significant a burden on their short-term cash flow BY INVESTING" or ..."BY DOING SO" then you could make an argument that "they" could mean "employees." But absent that tie-back to the concept of investing, the main clause of the sentence ("they wonder whether...") is a separate thought from the conditional introduction.