I'm actually not sure as to how any of the choices are similar to the reasoning. I didn't want to be stuck on this question for too long, so I just bubbled in an answer, but I'm still not sure how to arrive at the correct choice. Some clarification would be MUCH appreciated!

Can someone explain the difference between answer choice D and A?
I'm sure it has to do with the contrapositive of the argument, but I'm not catching it.

Thanks in advance!