Despite the Fact That Not All Markets Are Perfectly Competitive,the

Despite the fact that not all markets are perfectly competitive,the study of perfect competition is worthwhile,in part because

A) buyers and sellers are price takers in all markets, not just in perfectly competitive markets.
B) buyers find it difficult to buy all they want to buy, and sellers find it difficult to sell all they want to sell, in all markets, not just in perfectly competitive markets.
C) some degree of competition is present in most markets, not just in perfectly competitive markets.
D) perfectly competitive markets are the most difficult markets to analyze, and this makes the study of other types of markets easy in comparison.