Write the Set in Set-Builder Notation $\{ 4 \}$ A) $\{ x \mid x$

Multiple Choice

Write the set in set-builder notation.
- $\{ 4 \}$

A) $\{ x \mid x$ is the natural number $4 \}$
B) $\{ x \mid x$ is a natural number $\}$
C) $\{ x \}$
D) $\{ x$ is a constant $\}$