在一个停车场上，汽车、摩托车共停了48辆，其中每辆汽车有4个轮子，每辆摩托车有3个轮子，这些车共172个轮子，停车场上有摩托车______辆．

—Now, people's life in Hengyang is ______ than before.

—Yes. Many people have their own cars. [ ]

A. much better

B. less better

C. more better