If obliged to cross traffic lanes，a vessel shall do so on a heading as nearly as practicable （）to the general direction of traffic flow.

A.in restricted visibility
B.between dusk and dawn
C.in heavy traffic
D.All of the above

A.the prevention of collision
B.the promotion of the traffic flow
C.the complying of port regulation
D.the development of navigational technique

A.adopted
B.adapted
C.adjusted
D.admitted