由小承气汤变为厚朴三物汤属于( )

A．药味增减变化

B．药量增减变化

C．剂型更换变化

D．药味、药量同时增减变化

        advertisements are of great help, I don't think we should entirely rely on them.   [ ]

A. Since      

B. While          

C. Because        

D. As