The tailshaft sealing arrangement found a little lube oil leaky and caused a lot of seawater into the bearing, the step should be taken as a makeshift is（）

A、dropping lube oil for lubrication, reducing the pollution to the sea

B、setting a temporary gravity oil tank and enhanced the position properly

C、lubricating with the used lube oil

D、lubricating with the fresh water and navigation in a lower speed