​ In the figure below, the horizontal lines are parallel and the bisectors of the two interior angles intersect at T. Which is m?

In the figure below, the horizontal lines are parallel and the bisectors of the two interior angles intersect at T.

Which is m?
 

A. 50

B. 80

C. 100

D. 120

Given A(6, -17), B(-6, 17), C(4, 9), D(-4, 4), the midpoint of which segment is at the origin?

A. AB

B. BC

C. AD

D. AC