换城消费：指由于两个城市之间交通便捷，物价高低不一，市民经常到对方城市购物的消费方式。 下列属于换城消费的是?

A.北京市民小汪告诉记者：在北京6块钱一斤的红富士苹果，天津10元能买4个；北京80元一桶的食用油，天津才65元 

B.每次听到珠海有商场搞促销，深圳的李女士都会兴高采烈地赶去血拼，半天时间，家里就满是她的战利品 

C.赵女士每次从韩国回来，都在机场免税店买一大堆化妆品，这比在国内购买同一韩国品牌省不少钱 

D.黄先生在南方某市工作了七八年，眼见物价一路狂飙，准备卖掉自家房子，和妻子一块回北方老家养老

Why did regionalism become so popular in the U.S. during the Great Depression

A．Because the paintings sold very well.

B．Because it helped strengthen people’s faith in their country.

C．Because people liked to live in the country at that time.

D．Because it helped recover the economy.