"Certified shade-grown, organic coffee" is an example of requiring home standards in a foreign market instead of trade barriers

Suppose that there is an improvement in technology in the market for iPhones. Which of the following is TRUE?

A) Supply will increase and the market clearing price will fall. B) Supply will increase and the market clearing price will rise. C) Demand will increase and the market clearing price will rise. D) Demand will increase and the market clearing price will fall.

Suppose that when disposable income increases by $1,000, consumption spending increases by $750. Given this information, we know that the marginal propensity to consume (MPC) is

A) .25. B) .75. C) $1,000/$750 = 1.33. D) 1/.25 = 4.