A perfectly inelastic demand curve implies that what:

A. the buyers decrease their purchases when the price rises

B. the buyers respond substantially to an increase in price

C. the buyers increase their purchases when price falls

D. the buyers purchase the same amount when the price rises or falls

Which one is demand the most price elastic?

A. Milk

B. Happy Cow brand milk

C. Happy Cow brand milk at Ralph's Grocery Store

D. Each of the above will exhibit the same price elasticity of demand