In case of a collision, the following, amongst other steps are considered as a general plan of action; which one will be a priority in case of an underwater hull damage?

A. Assessing possible pollution due to rupture of fuel and or cargo (oil or chemical) tanks;
B. Taking corrective action to minimize the quantum of pollution; reporting the incident.
C. Assembling the emergency party.
D. Preparing for or implementing fire-fighting measures (in the event of a fire).