PLEASE HELP WILL MARK BRAINLIEST AND GIVE 20 POINTS!!!

A right rectangular pyramid is sliced vertically (down) at the red line by a plane not passing through the vertex of the pyramid. What is the shape of the cross-section.

A Trapezoid
B Triangle
C Rectangle
D Cylinder

PLEASE HELP WILL MARK BRAINLIEST AND GIVE 20 POINTS A right rectangular pyramid is sliced vertically down at the red line by a plane not passing through the ver class=