If A and B are two sets such that A∪B=A∩B, then _____?

B≤A

A=B

A≤B

None of these

Given:

A ∪ B = A ∩ B

This equation implies that every element that is in A or B (or both) is also in both A and B.

This can only be true if:

A = B

or, in other words, A and B have exactly the same elements.