Final answer:
The document that must be provided to the purchaser at least 1 business day prior to the closing on the sale of a home is the b) Closing Disclosure.
Step-by-step explanation:
The document outlining all the costs associated with closing on the sale of a home that the purchaser must receive at least 1 business day prior to the closing is the Closing Disclosure. This document provides a detailed breakdown of all the fees, costs, and charges that the buyer and the seller will be responsible for at the time of closing. These may include loan origination fees, appraisal fees, title insurance premiums, and property taxes, among others. The Closing Disclosure is a critical part of the home-buying process, designed to give consumers a clear understanding of the costs associated with their mortgage transaction.