A vessel not under command sounds the same fog signal as a vessel（）.

A.not under command
B.aground
C.dredging
D.constrained by her draft

A.three all-round red lights instead of the lights required for a power-driven vessel of her class
B.the same lights as a vessel restricted in her ability to maneuver
C.three all-round red lights in addition to the lights required for a power-driven vessel of her class
D.the lights for a power-driven vessel which is not under command

A.three all-round red lights
B.two 225°red lights
C.three all-round blue lights
D.two 225°blue lights