Fill in the missing reasons for the following two-column proof for the following information.
Given: M is the midpoint of PQ; MQ = 12
Prove: PM = 12
a) 1. Given; 2. Definition of Congruence; 3. Definition of Midpoint
b) 1. Given; 2. Definition of Congruence; 3. Substitution
c) 1. Given; 2. Definition of Midpoint; 3. Definition of Congruence
d) 1. Given; Definition of Midpoint; 3. Substitution
