You are underway in the North Sea on course 216°T when you sight a buoy bearing 021° relative. Under the IALA Buoyage System, you are in the best navigable water if the buoy __________.?
A) has a light characteristic of Q(6) + L Fl 15s B) is horizontally banded yellow, black, yellow C) has a double cone topmark with both points up D) has a continuous very quick light E)NULL