Question : If coffee and milk are complementary, which of the following will happen if coffee prices rise?
a) The amount of coffee demanded will increase.
b) The amount of coffee supplied will be reduced.
Option 1: A true
Option 2: B true
Option 3: Both A and B are true
Option 4: Both are false
Correct Answer: B true
Solution :
The cross elasticity of demand for complementary goods will be negative. When the price of one good rise, the demand for both complementary goods falls.
The amount of coffee supplied will be reduced.
Hence B is true.