Answer:
A fall in the price of the price of jet fuel _______ the marginal cost of producing air trips.
D. Decreases
A fall in the price of jet fuel _________ the market price and _______ the equilibrium quantity in the short run.
D. decreases
C. increases
Step-by-step explanation:
Marginal Cost = Total Change in Cost/Change in Quantity
Marginal Cost is the Cost of the additional unit produced . For example if we have 10 trips of the jet per day and the number of the passengers increase on less air ticket costs the marginal cost will decrease.
A fall in the price of jet fuel decrease the market price of the fuel. As the supply is increased the demand decreases .
The equilibrium quantity is increased as more fuel is available and costs are reduced.