Which of the following statements is an example of perfectly elastic demand??

A. A 10 percent rise in? Rita's income decreases supply of canned fish by 5 percent.

B. The price elasticity of demand for bottled water in Manitoba is 1.5 while in Saskatchewan it is 0.96.

C. Sherry is overwhelmed with buyers of her peaches when she lowers their price by a penny a kilogram compared to other sellers in the? farmers' market.

D. A high incidence of diabetes has resulted in a large increase in demand for insulin.