You are working with a team of developers on a Web site. You copy the Web site from the staging server to work on it locally. While making changes, you create new C# source code files and delete old ones. You need to ensure that your changes propagate to the staging server without affecting any files that you have not modified. Which tool should you use? （）

A. XCOPY
B. the Copy Web tool
C. the Publish Web tool
D. a Web Setup project