Which report is the contractor required to prepare detailing amounts requested?

The correct choice is the Contract Progress Report, as it is specifically designed to articulate the ongoing status and financial aspects of a contract. This report outlines the various phases of contract execution, including the amounts requested for payments at different stages of completion. It serves as a formal communication tool that helps both the contractor and the client track the performance and financial health of the project throughout its lifecycle.

In this context, the Contract Progress Report provides a comprehensive overview of both qualitative and quantitative metrics associated with the contract, making it essential for transparency and accountability in financial dealings. The detailed information in this report can help identify any discrepancies, project delays, or issues that need addressing, thereby facilitating better project management.

While other reports like the Financial Progress Report might contain elements of financial tracking, they do not focus solely on detailing amounts requested, and thus the Contract Progress Report is the most appropriate choice for the situation described.