So... the correct answer choice is E and I'm really trying to understand why that is the case. Is it because E is basically destroying the evidence which in turn would not be able to support the conclusion? If dogs, while learning how to perform tricks, are being influenced by their trainers, the dogs preference would not matter at all, because the dogs are being trained. The dogs are being taught to stray from their normal or preferred way of using their limbs. For example, if the dogs are being trained to do a trick with their left limb, this would dismantle the conclusion right? The conclusion is saying that dogs almost always prefer to use their right paw. If answer choice E is the case, then the conclusion falls apart.

I hope that all made sense. I'm just really trying to understand where I went wrong because I was stuck between choices B, C, and D.