Which Description Best Defines the Meaning of a Trial Commitment

Which description best defines the meaning of a trial commitment?

A) a final review with the customer of all of the product's features and benefits prior to asking for commitment
B) a prospect's agreement to try the product for a limited period of time with an option to return if not satisfied
C) questions asked to determine the prospect's readiness to buy
D) the seller's agreement to supply the product for a limited period of time on specified terms with an option to renew