请问B和C的区别是什么

问题如下：

An industry with many firms and differentiated products and low barriers to entry is best characterized as:

选项：

A.

perfect competition.

B.

oligopoly.

C.

monopolistic competition.

解释：

C is correct. Monopolistic competition is characterized by many firms, low barriers, differentiated products and some pricing power.

考点：垄断竞争

解析：垄断竞争具有企业多、壁垒低、产品差异化和一定的定价权等特点。