Can someone explain to me why "finding no evidence he had [commit sci fraud]" doesnt cancel out his charge / phd removal?

So incredible frustrating getting both implied questions right on the first try - then second guessing and putting the answer next to the correct one.

The one thing that prevented me from B was the idea that the acid was a anti-inflammatory. Theres never any outright mention that the acid prevents immune system production - just that it stops "deterioration".

I thought it could not be C because non-exterior walls doesn't include the roof? My mindset was that because they failed to mention Jones responsibility to roof + exterior wall it couldnt be the answer