Rivalry Among Competing Sellers Grows in Intensity When

Rivalry among competing sellers grows in intensity when:

A) rivals' products/services are sold at widely varying prices and there are only a few rivals.
B) rivals have highly differentiated products and buyer demand is growing rapidly.
C) there are so many industry rivals that the impact of any one company's actions is spread thinly across all industry members.
D) the products/services of rivals are strongly differentiated and buyers have high switching costs.
E) buyer demand is growing slowly or declining and the number of competitors is increasing and they become more equal in size and competitive capability.