The correct answer is A) attempt to contact her on the radiotelephone to arrange for the passage. In a narrow channel, the Rules of the Road require that a vessel overtaking another vessel must notify the vessel being overtaken of their intention to pass and receive acknowledgment before proceeding. Contacting the other vessel by radiotelephone is the appropriate way to communicate and coordinate this maneuver in an inland, narrow channel scenario. The other options are incorrect because sounding whistle signals (B) is not required, and proceeding to overtake without any communication (C) would violate the rules for safe passage in a narrow channel.