Which one of the following represents the commutative property?

A ∪ B = B ∪ A

A ∪ B = A ∪ B

A ∩ B = A ∩ B

None of these

Commutative property means the order doesn’t matter: 𝐴 ∗ 𝐵 = 𝐵 ∗ 𝐴.

Union ∪ is commutative, so 𝐴 ∪ 𝐵 = 𝐵 ∪ 𝐴.