9.By SMCP, choose one of the following sentences for expressing “Vessel’s intention is to decrease speed to 12 knots.” (A)“Intention: I am going to raise my speed to 12 knots.” (B)“Intention: I will reduce my speed to 12 knots.” (C) “Intention: I shall decrease my speed to 12 knots.” (D) “Intention: I am going to decrease my speed by 12 knots.”