Geometry Help please

Select the correct answer from each drop-down menu.

In the figure, all, and both lines are intersected by transversal Complete the statements to prove that m<1=m<5

allb (given)

m21 + m23 = 180° (Linear Pair Theorem)
m25+ m26 = 180° (Linear Pair Theorem)
m21 + m23 = 25+ 26(blank)
m 23 = m26 (blank)
m21 = m 25 (Subtraction Property of Equality

Options (for both blanks)

A) Transitive property of equality quality
B) Alternative interior angles theorem
C) Alternate exterior ankles theorem
D)Vertical angles theorem