WILL GIVE BRAINLIEST TO WHOEVER ANSWERS CORRECTLY!!!

What is the shape of the cross section of the figure that is perpendicular to the rectangle base and passes through the top vertex of the figure?

a.) a parallelogram that is not a rectangle

b.) a rectangle

c.) a triangle that must have the same dimensions as one of the faces

d.) a triangle that does not have the same dimensions as one of the faces​