FIRST ONE RIGHT IN THIS UNIT??!!! Not sure why i can get high difficultly right but easier questions wrong ...

I CANNOT GET A SINGLE ONE OF THESE RIGHT.

Spent forever on this one and while I now understand why E is right, I still can't understand why C is wrong-- his explanation is doing nothing for me. Any other ways to explain it?

@KMK Echoing that i would love a lesson for prescriptive vs descriptive conditions. I always get confused once that's mentioned!

Oh this question is diabolicial