关于The price of 的疑问

问题描述:

关于The price of 的疑问
The price of food and other things are much higher than before.这里price指food和other things,是单数,后面为什么用复数have?

你在书上抄的就一定是正确的吗?书也有出错的时候.
我的回答:
The prices of food and other things are much higher than before.
The price of food and the prices of other things are much higher than before.
The price points of food and other things are much higher than before.