How does a coast radio station communicating by HF radio normally identify itself?（）

A.By its subscriber number

B.By its call sign

C.By its MMSI

D.By its MID

在进行子女教育金规划时，下列哪个计划是做此决策时非攸关考量因素

A．家庭计划

B．育儿计划

C．子女教育计划

D．人身保险计划