>>509282392An answer is either correct or it isn't.
There are 16 possibilities total (no correct answer, A only, B only, C only, D only, A or B, AC, AD, BC, BD, CD, ABC, ABD, ACD, BCD, or all of ABCD).
Choosing at random leads to the following probabilities of getting a right answer: 0%, 25%, 25, 25, 25, 50, 50, 50, 50, 50, 50, 75, 75, 75, 75, 100%.
The actual values shown in the answers are inconsistent with 14 of these 16 possibilities - e.g. 0, 75, and 100 percent do not appear at all. If only C is correct then it shows 50% but that doesn't equal the 25% chance of selecting it, creating an inconsistency.
Only A or only D are the only valid possibilities.