Which of the following foods are commonly associated with trans fats?

Trans fats are artificially created through a process called hydrogenation, which solidifies liquid oils. They are commonly found in processed and fried foods, where they are used to enhance texture, extend shelf life, and improve flavor stability.

The correct answer identifies donuts and cookies as foods that often contain trans fats. These baked goods frequently use partially hydrogenated oils as an ingredient, which are a significant source of trans fats in the diet. Donuts, in particular, can be deep-fried, leading to higher trans fat levels, while cookies may contain these oils to achieve a desirable texture and moisture retention.

The other options include foods that are generally not associated with trans fats. Granola bars and fruit snacks can contain added sugars and other preservatives, but they are less likely to include trans fats compared to baked goods. Chicken and fish are whole protein sources that are not processed with trans fats, and salads and vegetables typically do not contain trans fats unless they are prepared with certain dressings or fried. Thus, the distinction lies in the processing and production methods of the foods listed, which is critical for understanding their trans fat content.