A 2.5-g sample of French fries is placed in a calorimeter with 500.0 g of water at a initial temperature of 21 °C. After the combustion of potato chips, the water has a temperature of 48°C. What is the caloric value (kcal/g) of French fries? A. 14 kcal/g B. 5.4 kcal/g C. 14 kcal/g D. 4.2 kcal/g