Left-handed persons have an advantage over right-handed persons on tas

That OE quoted above is just nonsense. If that's from a prep company, find better material to work from.



This is a distortion of what the question asks. We're asked to decide "which of the following hypotheses" is "best supported" by the information given. That is *not* the same thing as finding an "inevitable conclusion"; if a conclusion is 'inevitable', we don't need to introduce any additional assumptions. A conclusion can be 'supported' by the information provided we any assumptions we make are reasonable. There is no answer choice here which is an 'inevitable conclusion' from the information given; we're going to need to introduce assumptions, and we need to be sure our assumptions are reasonable.



A isn't 'close' to what they said at all. Lefties have an advantage at painting; that does not mean that more lefties become painters. For A to be a good answer, you need to make enormous assumptions here: you first would need to assume that people end up doing things they're good at, but second, you'd need to assume that there aren't other things lefties are better at that they might pursue instead of painting. That lefties are better at "right-brained" tasks suggests that lefties might be better than righties at all kinds of tasks, some of which might be more attractive to them than painting. In all, A is really far-fetched. If we can find an answer that requires us to assume less, it will be a better answer.



We aren't asked to find something which 'must be true' here; we only need to find the hypothesis 'best supported by the
information' given. D is perfectly well supported provided we assume that lefthanded painters are as susceptible to influenza as are lefthanded non-painters. That seems to me to be a perfectly reasonable assumption - why would choosing to become a painter influence your susceptibility to influenza? D is certainly a more reasonable answer than A here. I'd add - D does not need to be true here, since we'd need to introduce an assumption to reach D as a conclusion. But it's certainly the most reasonable of the five answer choices.