After Having a Monopoly in the Diamond Market for Many

Multiple Choice

After having a monopoly in the diamond market for many years, by 2000, De Beers faced competition from other companies.To maintain its market share, De Beers

A) began buying so-called "blood diamonds" in order to keep these diamonds out of the control of other diamond companies.
B) adopted a strategy of differentiating its diamonds. Each of its diamonds is now marked with a microscopic brand.
C) bought diamond mines in Canada and Russia that had been its competitors.
D) lowered the prices of its diamonds to make the market appear less profitable to potential competitors.