What is the missing reason for line 3 in this proof? Given: ; ; Prove: Statement Reason 1. ; ; 1. 2. 2. 3. 3. 4. 4. 5. 5. 6. 6. 7. 7. 8. 8. A. addition property of = B. substitution property of = C. definition of segment bisector D. segment addition postulate Please select the best answer from the choices provided