Last year, my brother , who is a software developer, earned ______ my sister, a teacher in a senior middle school.

A twice as many as  B as many as twice  C twice as much as  D as much as twice

消费者收入不变，商品价格按同等比例增加，则该消费者的预算约束线（）

A.向右平行移动

B.向左平行移动

C.横轴截距不动，纵轴截距左移

D.纵轴截距不动，横轴截距下移