Final answer:
The sources of carbohydrate in the milk-based beverage are lactose and high-fructose corn syrup (HFCS). Lactose is a natural sugar found in milk, while HFCS is an added sugar commonly used in processed foods and beverages.
Step-by-step explanation:
The sources of carbohydrate in the milk-based beverage are lactose, which is the milk sugar, and high-fructose corn syrup (HFCS).
Lactose is a natural sugar found in milk, including cow's milk. It is broken down by the body into glucose, which is a simple sugar. HFCS is an added sugar commonly used in processed foods and beverages, including flavored milk. It is a sweetener made from corn starch.