15. By SMCP, choose one of the following sentences for expressing ” Vessel is steering adangerous course； she must change her course to port side.”
(A) “Advice: you are steering a hazardous course - instruction: alter course to port side.”
(B) “Warning: you are running into danger； you are steering a dangerous course - advice: altercourse to port side.”
(C) “Information: You are running into danger； you are steering a dangerous course - instruction:alter course to port side.”
(D) “Question: you are running into danger - instruction: alter course to port side.”