Lines lm and ln lie in the plane x and intersect one another on the
perpendicular at point P. Which of the following statements must be true? I. A
line which lies in plane x and intersects line lm on the perpendicular at a
point other than P does not intersect ln II. Line segment MN, which does not
intersect lm, does not intersect ln. III. If line lo lies in plane y and
intersects lm and point P, plane y is perpendicular to plane x.

A) I only
B) II only
C) I and II only
D) I and III only
E) I, II, and III