Multiply. (x4 + 1)(3x2 + 9x + 2)

A. x4 + 3x2 + 9x + 3
B. 3x6 + 9x5 + 2x4 + 3x2 + 9x + 2
C. 3x7 + 9x6 + 2x5
D. 3x8 + 9x4 + 2x4 + 3x2 + 9x + 2

Let u = {q, r, s, t, u, v, w, x, y, z} a = {q, s, u, w, y} b = {q, s, y, z} c = {v, w, x, y, z}. list the elements in the set.a ∩ (b ∪ c)a) {q, s, w, y}b) {q, y, z}c) {q, s, u, w, y, z}d) {q, r, w, y, z}