【单选题】The price of milk in a country increases from €1.00 per liter to €1.70 per liter, and the quantity supplied does not change. This suggests the short-run supply of milk in this country is closest to be...
A.
perfectly elastic, meaning elasticity of supply is infinite
B.
perfectly inelastic, meaning elasticity of supply is zero
C.
perfectly inelastic, meaning elasticity of supply is infinite