Two things happen: 1) A technology is developed that makes the harvesting of coffee
beans twice as efficient and 2) the temperature falls, causing more people to buy coffee
a. Pcoffee increases, Qcoffee ambiguous
b. Pcoffee decreases, Qcoffee ambiguous
c. Qcoffee increases, Pcoffee ambiguous
d. Qcoffee decreases, Pcoffee ambiguous
e. None of the above