Question: At the close of the project, verify that all payments have been made a$.$ to the project sponsor. b$.$ to any subcontractors, consultants, vendors, or suppliers for any purchased materials or services. c$.$ to determine the project baseline budget. d$.$ to evaluate the lessons learned for the next project proposal.At the close of the project, verify that all payments have been made a$.$ to the project sponsor. b$.$ to any subcontractors, consultants, vendors, or suppliers for any purchased materials or services. c$.$ to determine the project baseline budget. d$.$ to evaluate the lessons learned for the next project proposal.