- AElements in exactly one of the sets
- B(A ∪ B ∪ C)′
- CElements in at least two of the sets
- DElements in at most one of the sets
Step-by-Step Solution
The three single-circle parts and the area outside every circle are shaded: elements lying in no set or in just one set — at most one. Exactly one would leave the outside white.
Answer: D) Elements in at most one of the sets