You are approaching a small vessel and see that it has the signal flag "T" hoisted. What should you do?

A
Proceed on present course and speed since the vessel is stopped and making no way through the water.
B
Keep clear of the vessel because it is engaged in pair trawling.
C
Attempt to call the vessel on VHF radiotelephone because it requires assistance.
D
Keep clear of the vessel because it has a diver down.
E