The project team needs to collect three different prices for a specific deliverable. Which of the following documents will be sent to potential vendors?

An RFP - Request for Proposal - solicits a vendor's proposed approach, methodology, and price for a less-defined requirement, not just a price comparison.

An RFQ - Request for Quote - is sent to vendors when the project team has fully defined the deliverable and needs only price information to make a selection. It is the correct document when the sole objective is obtaining and comparing cost figures from multiple vendors, as described in the question.

An RFI - Request for Information - is used early in procurement to gather general market or capability information from vendors, not to obtain binding price quotes.

RFO - Request for Offer - is not a standard procurement document recognized in common project management frameworks such as PMI or CompTIA Project+.