A vessel restricted in her ability to maneuver when engaged in an operation for the maintenance of safety of navigation in a traffic separation scheme is（）complying with this rule to the extent necessary to carry out the operation.

A.enter the traffic separation zone in an emergency
B.cross a traffic lane
C.engage in fishing in the separation zone
D.proceed in an inappropriate traffic lane

A.sailing
B.proceeding
C.anchoring
D.maneuvering

A.proceed through an inappropriate traffic lane
B.engaged in fishing in the separation zone
C.cross a traffic lane
D.enter the separation zone，even in a emergency