MarilynR

you need an answer choice that shows that OUTSOURCING WILL BE MORE PROFITABLE THAN NOT OUTSOURCING.

the other four answer choices are completely irrelevant to the issue, which is the effect of outsourcing on profit.. choice (e),E is best- It shows a precise advantage of implementing the plan!

therefore, even though (e) requires additional assumptions, it's still the choice that "most strongly supports" the argument - because it's the only choice that even could support the argument.