Step 1: Review the standard makeup of cow's milk.Milk is a mixture of fat dispersed in a water-based solution containing proteins, lactose, and minerals.
Step 2: Pair each component with its corresponding approximate percentage.
A. Water: Milk is predominantly water, typically around 87%. Therefore, A corresponds to III.
B. Protein: Milk contains a relatively small amount of protein, usually about 3.3%. Thus, B corresponds to IV.
C. Lactose: Milk's sugar is lactose, generally making up approximately 4.8% to 5.0%. Consequently, C corresponds to I.
D. Total solids: This includes all non-water components (fat, protein, lactose, minerals), typically around 12-13%. Hence, D corresponds to II.
Step 3: Consolidate the pairings and identify the correct choice.The correct pairings are A - III, B - IV, C - I, and D - II, which aligns with option (4).