Which command will turn off Dynamic Trunking Protocol (DTP) on an interface?

A. Switch(config-if)# no dtp
B. Switch(config-if)# no switchport dtp enable
C. Switch(config-if)# switchport dtp disable
D. Switch(config-if)# switchport nonegotiate

D. The Dynamic Trunking Protocol can be turned off with the command switchport nonegotiate, which when configured states not to negotiate trunks via DTP.