Hello, Andy!

We can "eyeball" the equation . . .

The ellipse . .is:

(A) A vertical ellipse with foci at

(B) A horizontal ellipse with foci at

(C) An ellipse with a minor axis of length 8

(D) An ellipse with a major axis of length 6

We see that the major (longer) axis is in the y-direction, a "vertical" ellipse.

. . The length of the major axis is 8; the minor axis has length 6.

This eliminates answer-choices