Suppose that at a price of $30 per month, there are 30,000 subscribers to Small Town Streaming Service. If Small Town Streaming Service raises its price to $40 per month, the number of subscribers will fall to 20,000. Using the midpoint method for calculating the elasticity, what is the price elasticity of demand for this company's streaming service? a. 0.66 b. 2.0 c. 1.4 d. 0.75 e. 1.0