— _____________________?

— I can't find my key. [ ]

A. What are you doing

B. What's the matter

C. Where is my key

随着我国城乡居民人均可支配收入的增加，一直被视为高档耐用消费品的轿车正悄然走进寻常百姓家。这说明[ ]

A．收入是消费的基础和前提

B．消费拉动经济增长

C．物价水平影响人们的购买力

D．生产与消费相互影响