Critical Reasoning (CR) | Re: From 1900 until the 1930s, pellagra, a disease later discovered to res

The answer is A.

We can find this answer using the

Precise

strategy, since the question gives us enough information to figure out what we are looking for.
We are told that cotton farmers consumed corn, which doesn't have enough Niacin, and thus suffered from pellagra. However, when they had less money, they stuffed suffering. What could explain this? Well, it follows from less pellagra that they consumed less corn (since this is what caused it), and the change in income could explain this. So,
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