The phrase“ Nan Quan Bei Yui is often used to distinguish northern and southern martial arts, because________

A、One of the overall features of Nan Quan is more short-range fist fighting.;

B、This fist technique rarely uses legs but abounds in punches, in contrast with that in northern China.;

C、Southerners are generally short but strong extremely swift and flexible.;

D、The southerners are good at using the fists while the northerners are good at using legs.