Which command causes a Layer 2 switch interface to operate as a Layer 3 interface?

A.
no switchport nonnegotiate

B.
switchport

C.
no switchport mode dynamic auto

D.
no switchport

Explanation:
BD
The no switchport command makes the interface Layer 3 capable.
Source: http://www.cisco.com/c/en/us/support/docs/lan-switching/inter-vlan-routing/41860-howto-L3-
intervlanrouting.html