问题详情

Before fi-idges came into use， it was still possible for people to have fresh foods because __________. 查看材料
A.milk， meat， vegetables， etc. were delivered
B.it has promoted the sales of many kinds of commodities
C.foods can be preserved
D.most kids like iced soft drinks
E.every housewife needs food
F.the fridge produced when it is working请帮忙给出正确答案和分析，谢谢！