which statement is correct when an IEEE802.1Q trunk port receives an untagged frame?

By default, which statement is correct when an IEEE802.1Q trunk port receives an untagged frame?

A.
The frame is considered in the native VLAN and forwarded to the ports associated with that VLAN

B.
The frame is encapsulated and tagged as in the native VLAN

C.
The frame is broadcast on all ports regardless ofVLAN association

D.
The frame is dropped