The correct answer is A. Carbohydrates contain a lot of glucose, and insulin regulates blood glucose.
Step-by-step explanation:
Glucose is a substance produced by the liver, this substance is important for the metabolism because it regulates glucose levels in the blood by making cells absorb glucose and use it for different functions or store it. This also implies the higher the glucose level in food is the more insulin is produced. Due to this, the intake of carbohydrates that contain a lot of glucose causes the body to release insulin as the body breaks carbohydrates into glucose and the level of glucose is soon regulated by insulin. According to this, the reason body releases insulin after a meal high in carbohydrates is "Carbohydrates contain a lot of glucose, and insulin regulates blood glucose".