Which of the following is poorest country?

The above figure shows the market for neckties after the government has imposed a tax. How much deadweight loss results from this tax?

A) $250.00 B) $200.00 C) $150.00 D) $50.00

An increase in oil prices will shift the aggregate:

a. demand curve leftward. b. demand curve rightward. c. supply curve leftward. d. supply curve rightward.