下列关于进入和退出壁垒与市场集中度关系的表述正确的是( ) The correct descriptions about the relationship between entry and exit barriers and market concentration are()
A.
如果市场进入壁垒高,则市场集中就低 If the market entry barriers are high, then the market concentration will be low.
B.
如果市场进入壁垒高,则市场集中度就高 If the market entry barriers are high, then the market concentration will be high.
C.
如果退出壁垒高,则市场集中 度就高 If the exit barriers are high, then the market concentration will be high.
D.
如果市场退出壁垒低,则市场集中就低 If the market exit barrier is low, then the market concentration will be low.