If could be B or also C still kinda confused with the question but if I’m wrong then I’m sorry :(
Answer:
A calorie is a unit of measurement — but it doesn't measure weight or length. A calorie is a unit of energy. When you hear something contains 100 calories, it's a way of describing how much energy your body could get from eating or drinking it.
Explanation:
The small intestine is the major digestive organ
