Find the Union $\{a, b, c, d, e\} \cup\{f, g, h, i, j\}$

Multiple Choice

Find the union.
- $\{a, b, c, d, e\} \cup\{f, g, h, i, j\}$

A) $\varnothing$
B) $\{\mathrm{e}, \mathrm{f}\}$
C) $\{a, b, c, d, e, f, g, h, i, j\}$
D) $\{a, b, c, d, e\}$