已知全集U={4,5,6,8,9}，M={5,6,8}，则集合C_UM＝

A．{5,6,8}

B．{4,6,9}

C．{4,5,6,7,8,9}

D．{4,9}

Some warned that the step the US government has taken to cope with the current crisis is ________ much risk.

A．one of

B．the one of

C．the one

D．that one