Suppose the marjet price of a commodity increases by$3 per unit after the imposition $5 per unit sales tax. Thos indicates that
A.its elasticity of demand is lower than its elasticity of supply
B. its elasticity of demand is higher than its elasticity of supply
C. its demand is inelastic
D.its supply is inelastic
邊個answer先correct
請高手詳細explain
thx!