受禽流感影响，去年活鸡和鸡蛋价格持续下降，养鸡户纷纷压缩产量。今年三月份以来，鸡蛋价格不断走高，小张作出扩大养鸡规模的决定。这表明   

A．商品的价值总是围绕价格波动

B．利益最大化是生产的根本目的

C．价格与供求相互影响，相互制约

D．企业生产规模越大经济效益越好

If I ______ plan to do anything I want to，I’d like to go to Tibet and travel through as much of it as possible.

A．would

B．could

C．had to

D．ought to