All of the following at one time had control over an essential resource that served as a barrier to entry except
A)DeBeer's Diamond Company
B)Standard Oil Company
C)International Nickel Company of Canada
D)IBM

Question

Quizplus · Accepted Answer

IBM did not have control over an essential resource that served as a barrier to entry. DeBeers Diamond Company had control over the world's diamond supply, Standard Oil Company had control over the oil industry in the US, and the International Nickel Company of Canada had control over the world's nickel supply, all of which served as barriers to entry for competitors.

All of the Following at One Time Had Control Over