I'm interested but mine are pretty bad

C makes sense because it doesn't do anything to affect the stimulus.

The conclusion is 'the prevailing theory is wrong' because the painters must've eaten sea animals and because the cave paintings don't have paintings of sea animals.

If the cave painting has depictions of land animals, then the support between the premises and the conclusion aren't weakened. The prevailing theory can still be wrong. The painters must've eaten sea animals.

I feel that one of the problems that I have with Weakener questions is that I am not accepting the premises and the conclusion as true.

I picked D because I thought "If this were true then the argument presented above obviously wouldn't work." When in reality, I'm just changing the argument.

How do I fix this habit?