in the envelope shown, l m n o is a rectangle. the measure of angle p l o on the top flap is 45°.

short description, a diagram.,long description,
the diagram shows an envelope made from rectangle l m n o with triangle p l o on top that shares side l o.
angle p l m is made up of angles p l o from the triangle and angle o l m from the rectangle.
angle p l o measures 45°.
angle o l m is one of the corners of the rectangle.
question
what is the measure of angle p l m?
answer options with 5 options
a.
45°
b.
90°
c.
105°
d.
135°
e.
225°