A risk manager was asked to review all the loss exposures his company faces. The risk manager noted that the company obtained over 90 percent of its raw materials from one supplier

He voiced concern about business interruption if that supplier was closed for some reason. Acting on his recommendation, the company began to purchase raw materials from two other suppliers. Using multiple suppliers illustrates which risk control technique?
A) risk avoidance
B) duplication
C) separation
D) diversification

Answer: D