Please explain

@smilde11, this is a paradox question, so you're looking for the answer that gives you a viable explanation for why two phenomena that seemingly should be the same are different (or should be different and are the same). There's not really a way to diagram these or a shortcut to understanding them, so while you may feel like you got lucky, you're probably actually "getting it." To get these, you need to read the whole question to understand it and then see what answer gives a solid explanation and fits all the facts. (C) does that. The others don't. I hope that helps.