You are underway in reduced visibility.You hear the fog signal of another vessel about 20° on your starboard bow.Risk of collision may exist.You should（）.
- Aalter course to starboard to pass around the other vessel
- Breduce your speed to bare steerageway
- Cslow your engines and let the other vessel pass ahead of you
- Dalter course to port to pass the other vessel on its portside