题目内容：

—Have you ever heard of cups made of ice, tables made with tires(轮胎)？

—Yes. These can ______ in a low-carbon(低碳) restaurant, _______ is one of London’s two zero-carbon buildings in the Expo’s Urban Best Practice Area(城市最佳实践区)。

A．be founded, that

B．find, which

C．be found, which