Answer:
The net effects on the equilibrium price and quantity of oranges are:
c. An increase in the equilibrium quantity of oranges, the change in equilibrium price is uncertain.
Step-by-step explanation:
The promotion of the eating of oranges by Scientists will increase the demand for oranges. This increased demand will shift the equilibrium quantity of oranges demanded by consumers. With the use of the new fertilizer by farmers to increase the production of oranges, the equilibrium quantity of supply will shift with demand. However, it is uncertain, from the data provided, if the equilibrium price will upward or downward. This will depend on other market forces, e.g. the market competitiveness.