$$\text { Find the critical number(s), if any, of the function } f ( x ) = e ^ { x ^ { 2 } - 10 x }$$

Multiple Choice

$$\text { Find the critical number(s) , if any, of the function } f ( x ) = e ^ { x ^ { 2 } - 10 x }$$ Select the correct answer.

A) $\sqrt { 10 }$
B) 5
C) $\sqrt { 10 }$ and $- \sqrt { 10 }$
D) 5 and $- 5$