Which is false about engine trials?（）
- Aengine trails should be done after finishing the operation of turning the engine with the turning gear and starting the engine on air briefly
- Bin the operation of engine trails, the main engine should be running in low-speed
- CAs to the ship equipment with twin main engine, engine trials should be done with one engine ahead and another engine astern at the same time
- Dthe order “engine trials” should be given by the bridge