Which of the following documents is described in the statement below? "It is a type of procurement document used to request proposals from prospective sellers of products or services."

A Request for Information (RFI) is used to gather general information about vendor capabilities before a formal procurement is initiated, not to request proposals.

A Request for Quote (RFQ) solicits only price information from vendors for well-defined goods or services, not full proposals.

A Request for Proposal (RFP) is specifically defined as a procurement document issued to invite prospective sellers to submit comprehensive proposals describing their approach, methodology, qualifications, and pricing for fulfilling stated requirements. Unlike an RFQ which asks only for price, an RFP solicits full proposals and is used when the buyer needs to evaluate solutions rather than just costs.

A Request for Bid (RFB) is used when requirements are fully defined and selection is based primarily on lowest price, not on proposed solutions.