 
			 
			MCQOPTIONS
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				| 1. | A proof broken into distinct cases, where these cases cover all prospects, such proofs are known as ___________ | 
| A. | Direct proof | 
| B. | Contrapositive proofs | 
| C. | Vacuous proof | 
| D. | Proof by cases | 
| Answer» D. Proof by cases | |