Answer:
D. Supply decreased
Explanation:
When Supply of a product decreases the equilibrium price increases because at that point, demand of that commodity becomes more than the available quantity of the commodity. Also, a fall in the equilibrium quantity of a commodity in this case banana indicates that the supplier has reduced the amount of goods supplied at that particular point in time (supply decreased). It causes a relative scarcity of that product mostly when the demand for such commodity increases or maintain previous demand equilibrium numbers.