geometry

Give the reason for the step taken from a proof.

<1 and <2 are a linear pair given
m<1 + m<2 = 180* ?

a. congruent supplements theorem
b. vertical angles theorem
c. linear pair postulate
d. congruent complements theorem

when i put < i hope you know what i mean and when i put an asterisk sign just replace it with a degrees sign in your mind.

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