Solve the Problem $q$ Is $r$ Minus Six, And $s$ Is the Square Root Of

Multiple Choice

Solve the problem.
-If $q$ is $r$ minus six, and $s$ is the square root of $q$ , write $s$ as a function of $r$ .

A) $s ( r ) = 6 - \sqrt { r }$
B) $s ( r ) = \sqrt { 6 - r }$
C) $s ( r ) = \sqrt { r } - 6$
D) $s ( r ) = \sqrt { r - 6 }$