Find the Domain of the Composite Function F $f ^ { \circ } g$

Multiple Choice

Find the domain of the composite function f $f ^ { \circ } g$
- $$f ( x ) = 2 x + 2 ; \quad g ( x ) = \sqrt { x }$$

A) $\{ x \mid x$ is any real number $\}$
B) $\{ x \mid x \geq - 1 \}$
C) $\{ x \mid x \geq 0 \}$
D) $\{ x \mid x \leq - 1$ or $x \geq 0 \}$