If $n ( A ) = 40 , n ( B ) = 117$

Multiple Choice

If $n ( A ) = 40 , n ( B ) = 117$ and $n ( A \cup B ) = 137$ , what do you know about $n ( A \cap B )$ ?

A) $n ( A \cap B ) = 10$
B) 60
C) $n ( A \cap B ) = 20$
D) $n ( A \cap B ) = 22$