The two angles, when added, should form a straight line.
A. ∠RST and ∠RSV form the line VT B. ∠RST and ∠TSU form the line RU C. ∠RST and ∠VSU form opposite angles with each other D. ∠TSU and ∠USV form the line VT E. ∠TSU and ∠RSV form opposite angles with each other
