The heat liberated when 1.89 g of benzoic acid is burnt in a bomb calorimeter at 25℃ and it increases the temperature of 18.94 kg of water by 0.632℃. If the specific heat of water at 25℃ is 0.998 cal/g-deg, the value of the heat of combustion of benzoic acid is

• A. 881.1 kcal
• B. 771.12 kcal
• C. 981.1 kcal
• D. 871.2 kcal