What Can Be Said Regarding the Role of Industry Structure

What can be said regarding the role of industry structure on setting price?

A) In an industry in which there are many buyers and sellers,the pricing impact of any single firm will be fairly small.
B) In industry in which there are many buyers and sellers,the pricing impact of any single firm will be quite large.
C) Marketers should make pricing decisions irrespective of whether there are many or few competitors in the industry.
D) In an industry in which a small number of firms compete,the pricing impact of any single firm will be fairly small.
E) In an industry in which there are many buyers and sellers,firms will typically match the price of competitors.