根据短文内容，选择正确答案。
Recently, designer in Hong Kong has invented a special book that can transform(变形) into a piece of furniture. The special book shaped creation is called Bookniture. It can he unfolded to become a chair or a small table. People can either carry it around for a portable(手提的) chair or can store it in their homes to use as extra furniture.
The book was designed by Mike Mak. He came up with the idea after never having enough seats for his friends in his home in Hong Kong.
"I love having friends at my place, but I have never had enough seats for everyone, we would always end up just sitting on the floor. I really want a seat that doesn't take up any floor space when I don't need it. One day, however, the empty space on my bookcase drew my attention. Then came tile spark of a new idea Bookniture, furniture hidden in a book." said the 30-year-old designer.
Made from fully-recyclable kraft paper(牛皮纸), tile book measures 33 cm by 18 cm. It expands(展开) to14 times bigger once it's opened, and can support up to more than 100 times its own weight, It comes in two colors, brown and black, and can be bought for between HK$ 50 and HK$ 70.
