The Dietary Guidelines for Americans provide a variety of information related to nutrition and dietary practices. Among the options you've listed, one of the key aspects included in the guidelines is how to plan a low-sodium diet.
The guidelines typically cover topics such as:
- Encouraging a diet rich in fruits, vegetables, whole grains, and lean proteins
- Guidelines for managing sodium intake and its effect on health
- Recommendations for physical activity
- Guidance on portion sizes and overall caloric intake
Therefore, the best fit from the options is "how to plan a low-sodium diet."