Answer: If a firm successfully differentiates its product from other products in the market, then we should expect the elasticity of demand for the differentiated product to become: "A. more inelastic".
Explanation: Inelastic demand is that demand that is not very sensitive to a change in price. In this way, before a variation in the price the quantity demanded reacts in a less than proportional way. Therefore, if a company manages to differentiate its product, consumers will prefer it before other products, which will result in a more inelastic demand.