It’s the “all skeptics” part that is the problem in answer choice B. Walt says “generally accepted by the public”. He never once mentions skeptics specifically, or that ALL would be convinced. He is speaking very vaguely and broadly about the public in general, not an every single skeptic.

#feedback can you give us a change to see all the answer choices before you begin explaining them 1 by 1?

GUYS. it just clicked

is the negation of "and" not "or"?

inSETption