In January, 2500 Litres of Ice Cream Were Sold in Fredericton

In January, 2500 litres of ice cream were sold in Fredericton at $2 per litre. In February, 3000 litres were sold at $2.50 a litre. Which of the following is the most likely reason for this change in the price and quantity of ice cream sold?

A) the decision by Fredericton ice cream sellers to eliminate discount coupons
B) a reduction in wages in the Fredericton area
C) the release of a medical study showing that ice cream consumption improves mental health
D) the introduction of labour-saving, automated ice cream packing machinery