Competitive Pressures Stemming from Buyer Bargaining Power Tend to Be

Competitive pressures stemming from buyer bargaining power tend to be weaker in which of the following circumstances?

A) Most consumers vary the brands they choose for their cookware and kitchen gadgets.
B) There is a global decline in the demand for CD players.
C) The investment banking industry offers highly differentiated products.
D) The Internet offers a huge amount of information on a variety of products.
E) Heinz owns a metal-can manufacturing subsidiary to cut back on supplier costs.