Under the Inland Navigation Rules, two power-driven vessels are in sight of one another and approaching within half a mile. Vessel A sounds one short blast. Vessel B doubts the safety of the proposed maneuver. Which action is required of Vessel B?

1. A. Sound two short blasts to propose an alternative maneuver and proceed
2. ✓ Sound at least five short and rapid blasts and take appropriate precautionary action until a safe passing agreement is madeCorrect
3. C. Sound one prolonged blast and hold course and speed
4. D. Sound three short blasts to indicate astern propulsion and stop the vessel