Concept:Price elasticity of demand measures how strongly quantity demanded reacts to a price change.Explanation:The coefficient of price elasticity of demand is compared with 1.When the coefficient is less than 1, demand is inelastic.Here, the coefficient is 0.1, which is less than 1.So, a price change causes a less than proportional change in quantity demanded.This is the definition of inelastic demand.Answer:B. inelastic