The price elasticity of demand for a product is a measure of the: a champe in the equantity prrehared of the product relative to a change in a consumer's income. b. degree of consumser responsiveness to changes in the price of the product. e pereemane changet in the priser of two relneed prothetr. d. change in the quantity demanded of the product due to changes in factors other than price. e extent of eompetition in the morhet for the product.