Matching nutrients to deficiency diseases

Steps:

• Identify anemia as iron-deficiency disease, prevented by iron (nutrient 3).
• Identify rickets as calcium-related bone disease, prevented by calcium (nutrient 1).
• Identify scurvy as vitamin C-deficiency disease, prevented by vitamin C (nutrient 4, present in sweet potatoes).
• Match sequence: anemia (3), rickets (1), scurvy (4).

Why A is correct:

• A assigns 3 (iron) to anemia, 1 (calcium) to rickets, and 4 (vitamin C) to scurvy, aligning with standard nutritional prevention definitions.

Why the others are wrong:

• B duplicates A but is listed as identical, making it redundant; no unique correction.
• C swaps iron and vitamin C, incorrectly linking vitamin C to anemia and iron to scurvy.
• D assigns fiber (2) to anemia, which does not prevent it, and misplaces others.

Final answer: A