— Mr. Smith joined in different activities in Beijing. Do you know ___________?

— Since 5 years ago.

A．when he went there

B．how long he has stayed there

C．how soon he will come back

D．when he will come here

某国内汽车制造厂对中国经济增长潜力抱着乐观态度，除继续生产中等档次的车种外，在 2009年开始生产高端越野车，希望吸引国内市场的高端消费者。这种做法属于( )。

A．市场渗透
B．市场细分
C．工业细分
D．产品分散化