What assumption about store products is made in the letter to the editor?

The correct choice highlights an assumption made in the letter regarding the nutritional value of store products compared to local products. By asserting that store products are considered less nutritious, the letter implies a belief that consumers tend to prefer locally sourced items due to their perceived higher quality or health benefits. This assumption reflects a common perception that local products, often seen as fresher or grown with more sustainable practices, tend to offer greater nutritional advantages than mass-produced items typically found in larger retail environments. This reasoning connects directly to consumer choices and preferences based on health concerns, which is a common discussion point in many debates about food sourcing and health.