Find the Domain Of $\text { f/g }$ $f ( x ) = \sqrt { x + 7 } , \text { and } g ( x ) = \sqrt { x + 7 }$

Find the domain of $\text { f/g }$ . $f ( x ) = \sqrt { x + 7 } , \text { and } g ( x ) = \sqrt { x + 7 }$

A) $( - \infty , - 7 )$
B) $( - \infty , - 7 ]$
C) $( - \infty , 7 )$
D) $[ - 7 , \infty )$
E) $( - 7 , \infty )$