CDE is working. However, the customized PATH environment has not been implemented. Which of the following procedures should be performed to activate the implementation?（）

A.Update the .kshrc file

B.Edit $HOME/.dtprofile, and uncomment the DTSOURCEPROFILE=true

C.Copy /etc/.profile to $HOME/.dtprofile and edit the file as needed

D.Double click on the System Administration icon and select CDE profile