Specify the Domain for the Function $h ( x ) = \sqrt { x + 9 }$

Multiple Choice

Specify the domain for the function. $h ( x ) = \sqrt { x + 9 }$

A) $D = [ - 9 , \infty )$
B) $D = ( - 9,9 )$
C) $D = ( 9 , \infty )$
D) $D = ( - \infty , 9 ]$