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Which answer is consistent with Rule 36 — Signals to Attract Attention?
A
Vessels towing or pushing display additional masthead lights and a yellow towing light.
B
Sailing vessels show sidelights and sternlight.
C
In a sailing vessel of less than 20 metres, the sidelights and sternlight may be combined in one lantern at or near the top of the mast.
D
If necessary to attract attention, a vessel may make light or sound signals that cannot be mistaken for any prescribed signal.