正解:D
An RFP (request for proposal) is a document that solicits proposals from potential vendors for a specific project or service. An RFP typically describes the project scope, requirements, evaluation criteria, and instructions for submitting proposals. An RFP is the best document for the company to use to obtain and compare information on cabling services and costs from various vendors, as it allows the company to evaluate the vendors' qualifications, experience, approach, and pricing12.