Let U = {q, r, s, t, u, v, w, x, y, z}; A = {q, s, u, w, y}; 
and 
List the members of the indicated set, using set braces.(A ? B)'
A. {s, u, w}
B. {t, v, x}
C. {q, s, t, u, v, w, x, y}
D. {r, t, u, v, w, x, z}
Answer: D
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