Geometry

The answer is C.O, Q, R.

1. Recall the definition of points on a plane:

Points that lie on the flat, two - dimensional surface represented by the plane are on the plane.

2. Analyze each option:

A: Point Q is on plane D, but point P is just above the plane and point N is on the line perpendicular to the plane. So, these three points are not all on plane D.