【单选题】【单选】You are in charge of a stand-on vessel in a crossing situation. The other vessel is 1.5 miles to port. You believe that risk of collision exists. You should ______.
A.
take avoiding action immediately upon determining that risk of collision exists.
B.
immediately sound the danger signal.
C.
take avoiding action only after providing the give-way vessel time to take action, and determining that her action is not appropriate.
D.
hold course and speed until the point of extreme, and then sound the danger signal, taking whatever action will best avert collision