Which of these is considered a unilateral promise in an insurance contract?

In the context of an insurance contract, a unilateral promise refers to a situation where only one party is bound to fulfill a promise or obligation. In this case, the insurer's promise to provide coverage upon receipt of the premium constitutes a unilateral promise. The insurer is obligated to pay claims and provide benefits as outlined in the policy.

The insured's obligation to pay the premium does reflect a contractual obligation but does not fit the definition of unilateral because the insured actively participates in the contract by fulfilling this condition. The notion of both parties exchanging terms implies a mutual agreement, which is characteristic of a bilateral contract where each party has obligations. A condition to maintain the contract does not represent a promise but rather a stipulation that the insured must follow to keep the contract in effect. Therefore, in the context of unilateral promises, the insurer's clear and specific commitment to provide coverage stands out as the correct answer.