Find All the Critical Points of and Classify Each

Multiple Choice

Find all the critical points of and classify each as maximum, minimum, or neither. Select all possible choices.

A) The point (1, 3) is a local minimum.
B) The point (-1, -3) is neither a maximum nor a minimum.
C) The point (-1, 3) is neither a maximum nor a minimum.
D) The point (1, 3) is a local maximum.
E) The point (1, -3) is a local maximum.