If the elasticity of supply of a good is zero, then its
A) supply curve is vertical.
B) supply curve is horizontal.
C) demand curve must be vertical.
D) supply curve is positively sloped.
Question 2
Except for perfect substitutes or perfect complements, indifference curves
A) are straight lines with a positive slope.
B) slope upward to the right.
C) are bowed in toward the origin.
D) are bowed out away from the origin.
