下列选项中，关于标准仓单在交易所进行实物交割中的流转，说法正确的有（）。

A.卖方会员将标准仓单提交给交易所

B.交易所将标准仓单分配给买方会员

C.买方投资者将标准仓单授权给买方经纪会员，以办理实物交割业务

D.买方经纪会员将标准仓单分配给买方投资者

A person who sees someone fall overboard should（）.

A.call for help and keep the individual in sight

B.run to the radio room to send an emergency message

C.immediately jump in the water to assist the individual

D.go to the bridge to report the captain