If A = {x, y, z} and B = {u, v, w, x} and the universe is {s, t, u, v, w, x, y, z}Then (A ∪ B̅) ∩ (A ∩ B) is equal to

• A. {u, v, w, x}
• B. {x}
• C. {u, v, w, x, y z}
• D. {u, v, w}