While drilling loaded as shown in Sample Load Form #4 (Drilling), the DEEP DRILLER suffers a sudden unexpected starboard and aft inclination. The wind and waves are light. What might have caused the inclination?

A
Mooring lines 6 and 7 have failed.
B
The drilling crew has dumped the mud.
C
The drill string has broken.
D
Ballast tanks have equalized into tank 10S.
E