To enable C development in a Windows 10 development environment VM, follow these steps:

1. Start VS in the Windows 10 development environment VM.
2. Choose "File" -> "New" -> "Project", choose "Open Visual Studio Installer"
3. Choose "Desktop development with C++", click on "Modify"
   
4. Follow the steps in https://mp.weixin.qq.com/s/nVw5mhOC8CT9QD7pYH4yHQ, starting from "按照如下方法创建一个C语言文档"