Which of the following is a common source of trans fats?

Trans fats are commonly found in industrially processed foods, particularly those that undergo partial hydrogenation to improve shelf stability and enhance texture. Pies and pastries are prime examples of such products, as they often contain margarine or shortening, which can contribute to trans fat content. These baked goods typically have a flaky texture, made possible by the solid fats that can include trans fats.

In contrast, fruits and vegetables are natural foods that do not contain trans fats, while lean meats and whole grains also do not contain trans fats in significant amounts. Lean meats may contain small quantities of naturally occurring fats, and whole grains are known for their health benefits, including fiber and essential nutrients but also lack trans fats. This makes the option of pies and pastries the most accurate choice regarding common sources of trans fats.