How can you quickly add a new branch to a mind map?

A$.$

With the mind map selected, select the option$/$alt key to add a new branch

B$.$

With the mind map selected, select the control key to add a new branch

C$.$

With the mind map selected, select the return$/$enter key twice to add a new branch

D$.$

With the mind map selected, select the shift and control keys to add a new branch