听句子，缩写原文。（）

A．Supermarkets in the inner city and the suburbs are usually owned by the same company.

B．Products in grocery stores are more expensive than those in supermarkets.

C．There is a price difference for the same product even in shops run by the same company.

D．People prefer to shop in supermarkets, which are mostly located in the suburbs, with free parking space.

以下风险中，属于系统风险的是()。

A.信用风险

B.市场风险

C.操作风险

D.流动性风险