This is a ridiculous question, especially since it asks for what is most logically. We can't talk about logic if no logical connection about "suffer" has been made.

lmao i totally did. thanks for the headsup

large readership and best selling are not even close in terms of meaning smh

The problem for me was that the "this" in "this is probably the explanation" was ambiguous. If by this, they mean coffee->meth, then C should be the right answer, because it's the coffee that explains the difference in risks.

The logical leap required to go from Cold War to the very idea of alliance entailing having a common enemy is ridiculous. An alliance is not necessarily formed out of having a common enemy. It could be formed because both country can benefit from the protection of each other, without a specific enemy in mind.