List the Elements of the Set $\mathrm { A } = \{ 37,38,39,42 \}$

Multiple Choice

List the elements of the set.
-If $\mathrm { A } = \{ 37,38,39,42 \}$ and $\mathrm { B } = \{ 35,37,38,40 \}$ , list the elements of $\mathrm { A } \cup \mathrm { B }$ .

A) $\{ 35,39,40,42 \}$
B) { }
C) $\{ 37,38 \}$
D) $\{ 35,37,38,39,40,42 \}$