Marina Exam Reviewer: You are in sight of a power-driven vessel that sounds two short blasts of the whistle. This signal means that ______.

Marina Exam Reviewer 

You are in sight of a power-driven vessel that sounds two short blasts of the whistle. This signal means that ______. 

A. the vessel is altering course to port 
B. the vessel intends to leave you on her starboard side 
C. you should alter course to port. 
D. you should sound the danger signal

Answer:  A. the vessel is altering course to port