Difference between ServerRoot, DocumentRoot, and Directory

While playing with Apache, I messed up the paths without making a backup httpd.config file.

The file is located at C:\xampp\apache\conf\httpd.config

I want to keep my web project on the D: drive as a virtual folder. This is the current non-working state. How can I fix this or revert to the xampp defaults?

ServerRoot "C:\xampp\apache"
DocumentRoot "D:\workspace"
<Directory "D:\workspace\AutionWebSite">