Let Be a Universal Set $A = \{ \text { Dundee United, Witbank Aces, Maroka Swallows, Royal Tigers } \}$

Let $S = \{ \text { Bamsley, Manchester United, Southend, Sheffield United, Liverpool, Maroka Swallows, Witbank Aces, Royal Tigers, Dundee United, Lyon } \}$ be a universal set, $A = \{ \text { Dundee United, Witbank Aces, Maroka Swallows, Royal Tigers } \}$ , and $B = \{ \text { Sheffield United, Manchester United, Dundee United } \}$ .
Find $n \left( ( A \cup B ) ^ { \prime } \right)$ .

A) 1
B) 0
C) 7
D) 3
E) 4