This is an inference question. Use the answer choices to guide your reading. The passage mentions the "simplifications" of the Marxist view and says "Ultimately, a Marxist view of global interactions sacrifices a great many crucial concepts at the altar of one overarching economic perspective." This supports choice A.
Choices B and E both go too far; the author may not agree with the Marxist view but never says it should be abandoned. And while the passage calls nationalism, security, and the state "key concepts," the passage doesn’t say they "must" be included.
There is no support for choice C because the author doesn’t discuss what will happen in the future.
Choice D uses a lot of words from the passage but the meaning is incorrect.