A line segment connects point A to point B, with a point M on the line segment between A and B.

Question
What reason justifies the answer to the previous question?

Given: M is the midpoint of Modifying above A B with bar..

Prove: 2 left-parenthesis A M right-parenthesis equals A B

Statements Reasons
M is the midpoint of Modifying above A B with bar. given
Modifying above A M with bar congruent to Modifying above M B with bar A midpoint divides a segment into two congruent segments.
A M equals M B Congruent segments have equal lengths.
The length of A M plus the length of M B equals the length of A B Segment Addition Postulate.
? ?
2 left-parenthesis A M right-parenthesis equals A B Combine like terms.(1 point)
Responses

Distributive Property
Distributive Property

Symmetric Property of Equality
Symmetric Property of Equality

Substitution Property of Equality
Substitution Property of Equality

Subtraction Property of Equality

Subtraction Property of Equality

Subtraction Property of Equality