Final answer:
Conditional acceptance is the term that describes accepting an offer verbally with the intention to provide written confirmation later. It indicates acceptance under specific conditions, such as the subsequent provision of a written contract.
Step-by-step explanation:
The correct option describing the acceptance of an offer verbally with a promise of later written confirmation is indeed c) Conditional acceptance. In contract law, conditional acceptance refers to a situation where a party expresses their willingness to accept an offer but specifies that their acceptance is contingent upon certain conditions being met. In this case, the condition is the subsequent provision of a written confirmation.
The other options do not accurately characterize this scenario. Acceptance by silence implies acceptance without explicit communication. Express acceptance involves a clear and unequivocal agreement. Implied acceptance occurs through actions indicating acceptance, even in the absence of explicit verbal or written communication. Conditional acceptance, with the promise of later written confirmation, is a specific legal term denoting acceptance subject to specified conditions.