Geometry

The correct answers are

B.Points A and C lie in plane R, so line m lies in plane R

C.Points D and B lie in plane R, so line n lies in plane R

The Plane - Line Postulate states that if two points lie in a plane, then the line containing them lies in the plane.

A.Plane R contains points A, C, and E: This just mentions points within a plane and has nothing to do with the relationship between points on a line and the plane, so it's not an example of the Plane - Line Postulate.

B.Points A and C lie in plane R, so line m lies in plane R: Since points A and C are in plane R, the line m that passes throug...