Thanks for the question! You marked this as being a LG but it’s on a LR question; I’m going to explain why A is incorrect on the question that you commented on and assume you meant to type LR, but let me know if I’m wrong.
So first, let’s take a look at the stimulus. We’re told that science can’t adequately explain emotional phenomena. Since they can’t be explained by science, human emotions must not be physical phenomena. Right now, what we want is something like
~ES —> ~PP
Because then that’d show that if something can’t be explained by science, then it’s not a physical phenomena.
Now we’re asked to assume something that completes the argument. (A) tells us that whatever is not a physical phenomena can’t be explained by science. In other words:
~PP —> ~ES
And this is the reverse of what we’re looking for; the terms are in the wrong places.
Hope this helps! Feel free to ask any other questions that you might have.