Step-by-step explanation
By definition, a critical point is a number which makes the rational expression zero or undefined.
We have the expression:

1) We see that the numerator is zero for the values x = 3 and x = -5.
2) We see that the denominator is zero and the expression is undefined for the value x = -2.
Answer
The critical points are:
C. x = -5, x = -2 and x = 3