You are in a channel in U.S. waters near an industrial plant with a load/discharge facility for barges. You hear a siren being sounded at the facility. What does this indicate?

A
There is danger at the facility due to a fire or cargo release.
B
A towboat with a hazardous cargo barge is being moved to or from the facility.
C
The facility is warning a barge to shut down transfer operations due to weather conditions (electrical storms, tornado, etc.).
D
A barge at the facility has commenced loading or discharging operations.
E