When crossing the magnetic equator the（）.

A.Flinders bar should be inverted

B.Heeling magnet should be inverted

C.The quadrantal spheres should be rotated 180°

D.Flinders bar should be moved to the opposite side of the binnacle

甲乙两人因房屋买卖纠纷，诉至法院，经法院调解，达成调解协议．甲在两人均收到调解书并签收，后反悔．法院告诉他们只能______．

A．上诉

B．申请再审

C．另行起诉

D．要求法院判决