Identify the missing statement or reason to complete the two-column proof. Type the letter of your answer in the box.
| Given: | |
| Prove: |
Choices:
| a. | Addition Property of Equality |
| b. | |
| c. | Alternate Interior Angles Theorem |
| d. | SAS Congruence Postulate |
| e. | |
| f. |
Proof:
| Statements | Reasons | ||||
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