Assume that jack, hal, and sophia enter into a valid contract for the sale of the restaurant and for a covenant not to compete. the contract calls for hal and sophia to pay $300,000 now and 10% of the gross sales of the restaurant and frozen food to jack for the next ten years. there is a clause in the contract that states if the revenue dips below $50,000 per year, that jack would then get back the rights to sell the frozen food himself. this clause is:
a. a concurrent condition.
b. a condition subsequent.
c. a condition precedent.