Official ExplanationThe question asks which of the answer choices most strengthens the argument, so this is a strengthen question. Begin by distinguishing the argument’s conclusion from its premises, and then find the assumption.
The conclusion of the argument is that less printer paper will be used as a result of these changes than would have been used if these companies had continued to use handwritten memos. The changes referenced by the conclusion are defined in the premise of the argument that companies switched…from memos written…on printer paper to memos written on a computer and sent electronically with no use of paper. The argument concludes that because of these changes, less printer paper will be used. The assumption of this argument is that the introduction of the new process does not result in increased use of paper for any other reason. Put another way, there are no unintended consequences of the decision.
Because this is a strengthen question, look for an answer choice that eliminates a possible reason the electronic memo system does not result in less printer paper being used.
Many of the companies that have switched to electronic memos have increased the number of memos sent. The number of memos sent electronically is out of scope. The number of memos sent by companies that have switched to the electronic system does not address a reason that less printer paper is being used. Eliminate (A).
More printer paper was used to create manuals for the use of electronic memos than was used to write handwritten memos. If more printer paper was used to create manuals to explain how to use the electronic memos than would have been used to write handwritten memos, then the changes did not have the intended effect. This weakens the argument. Eliminate (B).
Companies that used more printer paper were more likely to switch to electronic memos than companies that used less printer paper. At first glance, this appears to be a good answer, but this choice does not address whether the electronic memos caused less printer paper to be used. Therefore, this choice is out of scope. Eliminate (C).
Some of the industries that have switched at least partially to electronic memos still primarily use printer paper for other operations. This choice does not impact the argument because the use of printer paper for other operations does not give any information regarding whether the use of electronic memos decreased the amount of printer paper used. Eliminate (D).
The amount of printer paper needed to explain the electronic memos is less than the amount that would have been used for handwritten memos.
This choice provides information to suggest that less printer paper is used to create the electronic system than would have been used to write memos, so a company that adopts the electronic memo system uses less printer paper. This choice strengthens the argument. Keep (E). The correct answer is (E).