What is always TRUE about the short-run equilibrium position for a firm in perfect competition?

An example of a real flow in the circular flow diagram is

A) a household's supply of work effort at its new business. B) Nike's payment of wages to workers in China. C) your county's collection of property taxes. D) the government's payment of wages to a soldier. E) a teacher's salary at the local high school.

Refer to the above figure. If the market price is equal to A, which statement can be made about economic profits?

A) Economic profits are positive and equal to ABCG. B) Economic profits are positive and equal to ABEF. C) Economic profits are negative and equal to GCEF. D) Economic profits are negative and equal to ABQ 0.