36. Competitive pressures stemming from buyers' bargaining power tend to be weaker when
(A) the number of buyers is small, such that each customer's business tends to be particularly important to a seller
(B)buyer demand is growing slowly or maybe even declining
(C)the costs incurred by buyers in switching to competing brands or to substitute products are relatively high
(D)buyers are well inforned about sellers' products, prices, and costs