Commercially prepared high moisture cheeses must be consumed within how many calendar days?

The correct answer is 7 days because commercially prepared high moisture cheeses are perishable items that are prone to spoilage due to their moisture content. High moisture cheeses include products like ricotta, cottage cheese, and fresh mozzarella, which can harbor bacteria if not stored properly. The guideline of consuming them within 7 days ensures that they are consumed while they are still safe and of good quality. This time frame balances safety and quality, allowing for proper consumption of the product while minimizing the risk of foodborne illness.

The other options do not provide a safety margin that aligns with food safety best practices for high moisture cheeses. Consuming them after longer periods could lead to degradation in quality and increased risk of spoilage.