Which statement describes Dynamic Trunking Protocol (DTP) mode ‘desirable’?

Which statement describes Dynamic Trunking Protocol (DTP) mode ‘desirable’?

A.
The interface actively attempts to convert the link to a trunk link.

B.
The interface is put into permanenttrunking mode and negotiates to convert the link into a trunk
link.

C.
The interface is put into permanenttrunking mode but prevented from generating DTP frames.

D.
The interface is put into a passive mode, waiting to convert the link to a trunk link.