When asked about this major traffic accident, the policeman said it should not have _________ if the driver hadn’t been speeding.

A．come out

B．come about

C．come across

D．happen

取北京某地区某村土壤浸出的溶液，加入无色酚酞溶液后显红色。下表为四种农作物适宜生长的PH范围，你认为该村土壤比较适宜种植的农作物是：