How to merge two folders with batch cmd

Question

I have these folders and I want to merge into one folder

- C:\1\a - C:\1\b - C:\1\c 

how to merge these folders in

 c:\1 

and delete the original using the package

Answer 1

 robocopy /mt /move "C:\1\a" "C:\1" * robocopy /mt /move "C:\1\b" "C:\1" * robocopy /mt /move "C:\1\c" "C:\1" * rd /s /q "C:\1\a" rd /s /q "C:\1\b" rd /s /q "C:\1\c" 

Help: rd /? , robocopy /? , xcopy /?