Adietary calorie equals 1 kilocalorie. which of the following statements correctly defines 1 kilocalorie?

a.1,000 calories, or the amount of heat required to raise the temperature of 1 kg of water by 1°c
b.1,000 calories, or the amount of heat required to raise the temperature of 100 g of water by 100°c
c.100 calories, or the amount of heat required to raise the temperature of 100 g of water by 1°c
d.10,000 calories, or the amount of heat required to raise the temperature of 1 kg of water by 1°f
e.1,000 calories, or the amount of heat required to raise the temperature of 1 g of water by 1,000°c