Which of the Following Is True with Regard to Monopolistic

Which of the following is true with regard to monopolistic competition?

A) Under monopolistic competition, the market consists of many buyers and sellers who trade at a single market price.
B) Under monopolistic competition, the market consists of only a few large sellers.
C) In a monopolistic market, little time is spent on marketing strategy.
D) Sellers can differentiate their products to buyers.
E) In a monopolistic market, price becomes a major competitive tool.