Question

Prior to the 1990’s, De Beers diamonds maintained a near monopoly on diamond mining and diamond retail, __________ was high because they controlled supply and demand and controlled prices.
A. the threat of potential new entrants
B. the threat of substitutes
C. the bargaining power of buyers
D. the bargaining power of suppliers
E. rivalry among competitors

Answer 1

The answer is D or E i’m not so sure goodluck!