I don't understand how E is correct. How can we assume that the decline was a failure? I feel like in a lot of the video lessons, it is explained that you can't really assume what the stimulus is saying.

I don't understand how B is the correct answer for #4 if D is not. If there is a difference between disproving and persuading, wouldn't there also be a difference between claiming the premise is false and stating we shouldn't be persuaded by an argument. If the term "disprove" is the key reason to not choose D, then how would "false" be accepted?