A sailing vessel is overtaking a power-driven vessel in a narrow channel，so as to pass on the power-driven vessel’s port side. The overtaken vessel will have to move to facilitate passage. The sailing vessel is the（）.
- Astand-on vessel and would sound two short blasts
- Bgive-way vessel and would sound no whistle signal
- Cstand-on vessel and would sound no whistle signal
- Dgive-way vessel and would sound two prolonged blasts followed by two short blast