A dietary calorie equals 1 kilocalorie.Which of the following statements correctly defines 1 kilocalorie?

A)1000 calories, or the amount of heat required to raise the temperature of 1 g of water by 1000°C
B)100 calories, or the amount of heat required to raise the temperature of 100 g of water by 1°C
C)10 000 calories, or the amount of heat required to raise the temperature of 1 kg of water by 1°F
D)1000 calories, or the amount of heat required to raise the temperature of 1 kg of water by 1°C
E)1000 calories, or the amount of heat required to raise the temperature of 100 g of water by 100°C