Which one of the following statements about the rivalry among competing sellers is true? A. Rivalry increases as the products of rival sellers become less differentiated and weakens as the products of industry rivals become more strongly differentiated.
B. Rivalry usually becomes more intense as competitors become more unequal in size and capability and as the number of competitors decreases.
C. Rivalry grows weaker as it becomes less costly for buyers to switch brands and grows stronger as buyer switching costs rise.
D. Rivalry is usually stronger when buyer demand is growing rapidly, and weaker when buyer demand is growing slowly or even falling.
E. The strength of rivalry diminishes when one or two companies are successful in employing powerful strategies that produce sizable gains in sales and profitability.