What is the recommended method for cleaning empty herbicide and pesticide containers? ( )

A、Rinseoncewithsoapandwateranddiscardthecontentsdownanyopendrain.
B、Triplerinsethecontainerwithwaterandsavethecontentsformixingwithadditionalherbicideforfutureuse.
C、Rinseoncewithsoapandwaterandsavethecontentsformixingwithadditionalherbicideforfutureuse.
D、Triplerinsethecontainerwithwateranddiscardthecontentsdownanyopendrain.