(A) describes circular reasoning, which is when the conclusion is assumed as a premise. You might be attracted to this because the argument feels like it's just asserting its conclusion without real proof. But circular reasoning requires the conclusion to actually appear as one of the premises, and that's not what happens here. The conclusion is that global recessions can never be prevented. Neither premise says this. The first premise establishes a necessary condition for preventability, and the second premise says economists have failed to predict recessions. Those are distinct claims from the conclusion, even if the reasoning that connects them to the conclusion is flawed.

The author didn’t need to establish this, because no part of the argument assumed that any economists claimed the ability to predict recessions.

(C) says the author treats predictability (a necessary condition for prevention) as though it were sufficient for prevention. That would mean the author argues: "Recessions are predictable, therefore they'll be prevented." But the author assumes that recessions are not predictable, and concludes that they can't be prevented. That's denying a necessary condition to deny the thing that depends on it, which is a logically valid move. The flaw in the argument isn't in how the author uses the relationship between predictability and prevention. It's in how the author arrives at the claim that recessions aren't predictable in the first place.

This captures the flaw. The economist's premises only tell us what has happened so far: economists have failed to predict recessions using the best currently available techniques. But what if those techniques significantly improve? If they did, economists might eventually be able to predict recessions. The argument never addresses this possibility, and that's why the leap from "economists haven't predicted recessions" to "recessions can never be prevented" doesn't hold up.

(E) is tempting because it sounds like it's describing something close to the argument's reasoning. But it has two problems. First, the conclusion isn't that recessions won't occur. The conclusion is that they can't be prevented. Recessions will still happen; the economist is saying we can't stop them. Second, the economist doesn't actually have "information" that recessions are unpredictable. That's the very thing the economist assumes without justification. The second premise tells us that economists have failed to predict recessions so far, not that recessions are inherently unpredictable. (E) treats the economist's unjustified assumption as though it were established information.