The light rhythm of Morse (A) is shown on（）.

A.You may enter fairway
B.You should enter fairway
C.ANSWER. It is permitted to enter fairway
D.You could enter fairway

A.I may enter fairway
B.I might enter fairway
C.INTENTION. I will enter fairway
D.I will probably enter fairway

A.as soon as practicable on leaving port
B.prior to departure
C.within 24 hours of departure
D.within 12 hours of departure