Can help to solve this p4 question pls?

Here's how I solved: Object B = 100 - 80 (4th diagram minus 3rd diagram) (so option A is correct) Object C = 75 - 40 - 20 (2nd diagram minus 1st diagram - Object b) (so option B is correct) Just to be sure, I checked option D (most straightforward): Objects A B and C = 100 - 40. Hence, option D is incorrect. haha.. so answer should be 2.