Final answer:
Oranges are the best source of vitamin C due to their high content of 80mg per serving. Vitamin C has numerous health benefits, including boosting the immune system, promoting iron absorption, and reducing the severity and duration of common cold.
Step-by-step explanation:
The nurse should recommend 1 medium orange as the best source of vitamin C for the community group. Oranges contain 80 mg of vitamin C per serving, making them a rich source of this essential nutrient. Vitamin C has numerous health benefits, including boosting the immune system, promoting iron absorption, and reducing the severity and duration of common cold.