In one pointed perspective, a 10 cm pencil, that is parallel to the picture plane, is reflected onto reflecting surface on the ground plane. If the pencil is perpendicular to the ground plane, what is the feature of its refection?
A. The reflection is 5 cm long and perpendicular to the picture plane
B. The reflection is 10 cm long and perpendicular to the ground plane
C. The reflection is foreshortened to a point and perpendicular to the picture plane
D. The reflection is 10 cm long and parallel to the ground plane
