Question 8 (3 points)
Suppose that the cross-price elasticity of demand for milk with respect to the price of Barq's root beer is -0.25. If the price of Barq's Root Beer increased by 10%, then the quantity demanded of milk would \_\_\_\_\_\_\_\_ because milk and Barq's Root Beer are considered \_\_\_\_\_\_\_\_.
a) Decrease by 2.5%, complements.
b) Decrease by 40%, substitutes.
c) Increase by 2.5%, complements.
d) Increase by 40%, substitutes.