Which of the following sentences is least likely to be misinterpreted?
A. The contract shall be of no effect should either aforesaid party be unable to fulfill its obligations within a reasonable time.
B. This contract shall be null and void if its completion is unsatisfactory.
C. The party of the first part shall remunerate payment within a reasonable amount of time after completion of the contract to the party of the second part, unless the sum is in dispute.
D. If, upon completion of the work contracted, a licensed building inspector finds the materials or workmanship unsatisfactory, this contract will be void and no payment will be made.