According to the regulation of the voyage trial on new ship, ____ is one of the trial item

According to the regulation of the voyage trial on new ship, ____ is one of the trial items of the UMS ship bridge control.

A.starting and direction changing trial

B.cancelling accelerating function trial

C.lowest stable speed trial

D.continuous running trial

请帮忙给出正确答案和分析，谢谢！