11. Effective supply is the total amount of a commodity
A. from a single producer
B. in the warehouses of producers
C. offered for sale at a market price
D. produced for the market
12. Prince elasticity of supply can be influenced by the following factors except
A. time period
B. cost of production
C. size of consumers' income
D. nature of the product
13. Increase in the supply of a product can be caused by
A. change in tastes and fashion of consumers
B. increase in the incomes of consumers
C. a fall in the cost of production
D. increase in the price of a product
14. A rational consumer will purchase a commodity whose price is
A. greater than his marginal utility
B. less than his marginal utility
C. equal to his marginal utility
D. equal to his total utility
15. Parallel market are usually the result of
A excess supply
B. the activities of rich individuals
C. price legislation
D. inadequate information