Final answer:
The scenario with Ralph receiving $10,000 from the other driver in an accident in exchange for not suing is an example of an accord and satisfaction, which is a legal agreement to settle a dispute by performing a new duty.
Step-by-step explanation:
Ralph is injured in an automobile accident and the other driver pays him $10,000 in exchange for Ralph agreeing not to pursue legal action. This scenario is an example of c. an accord and satisfaction. In legal terms, an accord is an agreement where one party agrees to give or perform a new duty or forbearance which is not owed to the other party or which is in dispute. Satisfaction is the performance of that agreement. Since the debt Ralph could claim is disputed or unliquidated, and both parties agree to settle the matter through a specific action (the payment of $10,000), it is not a previously agreed upon, fixed amount (a liquidated debt).