A little IQ question of 2007 National English Contest for College Students.  So interest!...Can you answer it?

The question is:

If someone could take a sheet of paper 0.1mm thick, tear it in half, put the pieces on top of each other, tear this in half, then repeat the process until the paper had been torn 25 times, what would be the final height of the pile of paper?

A. As thick as a book.                   B.As tall as a man.

C.As high as a house.                  D.As high as a mountain.

Which one do you choose?

Happy festival of lanterns everybody!

作者：协力art