下列关于Web服务器默认文档的描述中正确的是（）

A．只能是asp、jsp或php文件

B．只能是HTML文件

C．只能是HTML、asp、jsp或php文件

D．可以是任何操作系统支持的文件

John was absent from school yesterday. He _____ a wonderful story to explain his absence.[ ]

A. put up

B. set up

C. made up

D. took up