Let Find the Set $( A \cup B ) \cup C$

Let $\begin{aligned}A & = \{ \text { Janet, Jill, Sally, Lucy } \} \\B & = \{ \text { Jill, Lucy, Jennifer } \} \\C & = \{ \text { Joan, Jill, Lucy } \}\end{aligned}$
Find the set $( A \cup B ) \cup C$ .

A) $\{ \text { Joan, Jill, Lucy\} }$
B) $\{ \text { Janet, Jill, Sally, Lucy, Jennifer, Joan } \}$
C) $\{ \text { Janet, Jill, Sally, Lucy, Jennifer, Sally } \}$
D) $\{ \text { Jill, Lucy } \}$
E) $\varnothing$

Correct Answer:

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