What is typically required from promisors when fulfilling a joint promise?

In the context of a joint promise, the correct approach is typically for the promisors to engage in collective execution of the promise. When multiple parties make a joint promise, they are all mutually responsible for fulfilling the obligations set forth in that promise. This means that the parties must work together to ensure that the agreed terms are met, rather than one party acting independently.

Collective execution is essential because it recognizes the interconnected nature of joint promises; the performance of the promise by one party can directly affect the other party's ability to fulfill their end of the deal. Success in a joint promise often requires coordination, collaboration, and sometimes, joint action to achieve the desired outcome. Thus, each promisor must rely on the other for effective fulfillment of the promise.

The other options do not quite capture the essence of joint promises. Independent fulfillment suggests that each promisor can completely fulfill their part without regard for the others, which undermines the collaborative responsibility inherent in joint promises. Sequential performance implies that one party must complete their obligation before the next can start, which is not a requirement of joint promises where all parties may act simultaneously. Lastly, non-reliance on shared responsibility contradicts the fundamental principle of joint promises, as it eliminates the expectation that performance is