If the Price Elasticity of Demand for a Product Is

If the price elasticity of demand for a product is -1.0, and the cross-price elasticity of demand for the product with respect to a competitor's product is 5.0, then the firm's total revenue will remain constant if a 1 percent increase in the price of the competitor's product is accompanied by

A) a 1 percent increase in the price of the firm's product.
B) a 5 percent decrease in the price of the firm's product.
C) a 5 percent increase in the price of the firm's product.
D) None of the above is correct.