Question

What is the missing step in the given proof?
A) Statement: m 4 = m 15
Reason: Substitution Property of Equality
B) Statement: m 4 + m 8 = 180°
Reason: definition of supplementary angles
C)nStatement: 7 and 8 are supplementary.
Reason: Linear Pair Theorem
D)Statement: m 4 = m 16
Reason: Transitive Property of Equality
E) Statement: 15 and 8 are supplementary.
Reason: Transitive Property of Equality