The settlement is home to nearly 1,000 people, _____ left their village homes for a better life in the city.

A．many of those

B．many of which

C．many of them

D．many of whom

用( )核算国内生产总值即是通过核算在一定时期内全部经济单位(居民、企业、政府、进出口部门)，对最终产品的支出总量相加得出总支出来计量GDP的方法。

A．支出法
B．收入法
C．生产法
D．混合法