影响股票市场供给的制度因素包括（）。

A.股权流通制度

B.股权认购制度

C.市场设立制度

D.发行上市制度

I usually sit _____ the classroom, so that I can hear the teacher who likes to stand _____ the class clearly. [ ]

A. in front of; in the front of  

B. in the front of; in front of  

C. in front of; in front of  

D. in the front of; in the front of