Final answer:
The quantity of apples and oranges demanded will decrease.
Step-by-step explanation:
The correct answer is B. The quantity of apples and oranges demanded will decrease.
When the price of a good increases, consumers tend to buy less of that good. This is because the higher price makes the good less affordable and reduces the quantity demanded.
In this case, if the price of both apples and oranges increases by 15%, consumers will buy less of both goods.