Answer:
B. The elasticity of demand is -0.126
Step-by-step explanation:
% Change in Quality demand = -2.65% (this is negative because of drop in prenatal smoking)
% Change in price = 21%
Elasticity of demand is given by the formula below:
Elasticity of demand = % change in quantity demanded ÷ %change in price
Elasticity of demand = -2.65 / 21
Elasticity of demand = -0.126