The price elasticity of demand for a firm’s product is -3. If the firm’s advertising elasticity of demand is 1.5, the profit-maximizing…

The price elasticity of demand for a firm’s product is -3. If the firm’s advertising elasticity of demand is 1.5, the profit-maximizing advertising-to-sales ratio is:

-4.5.

2.

0.25.

-1.5.

0.5.