Which of the following is the correct standard for when a departure from the Inland Navigation Rules is permissible under Rule 2(b)?

1. A. Whenever the master determines that strict compliance is inconvenient given traffic density.
2. B. Only when directed by a Vessel Traffic Service.
3. ✓ When special circumstances, including the limitations of the vessels involved, make departure necessary to avoid immediate danger.Correct
4. D. Whenever the vessel is operating in a designated traffic separation scheme.