Final answer:
One cup, which is equivalent to 250 mL, is the standard serving size for 'Milk and Alternatives' according to the Canada Food Guide. This applies to milk and fortified soy beverages and is the correct response to the student's question.
Step-by-step explanation:
The student asked how much milk, including fortified soy beverages, is considered one serving according to the Canada Food Guide (CFG). Looking at the serving size information provided, one cup of milk is a typical serving size for dairy products. This is in line with the details provided and accounts for about 0.25 liters or 250 milliliters. When considering the CFG Servings for 'Milk and Alternatives', option (a) 1 cup, 250 mL would therefore be the correct answer, given its equivalence to a typical serving size for milk and similar beverages. It's important to note that while the volume of a substance like milk is measured in liters or milliliters, a cup is a customary unit for measuring liquid capacity and is equal to eight ounces.
For individuals interested in consuming dairy products, it is advisable to opt for low-fat or nonfat versions. These options offer the same essential nutrients, specifically calcium, but with fewer calories and less fat compared to whole-milk products. Furthermore, for those who are lactose intolerant or prefer plant-based options, lactose-free, and fortified soy or rice beverages are also rich in calcium and constitute valid alternatives for a serving of milk.