What is the difference between an 'increase in supply' and an 'increase in quantity supplied'?
a. There is no difference between the two items; they both refer to a movement along a given supply curve.
b. There is no difference between the two terms; they both refer to a shift of the supply curve
c. An 'increase in supply' means the supply curve has shifted to the right while an 'increase in quantity supplied' means at any given price supply has increased.
d. An 'increase in supply' means the supply curve has shifted to the right while an 'increase in quantity supplied' refers to a movement along a given supply curve in response to an increase in price.
