ACE Personal Trainer Practice Exam 2026 – 400 Free Practice Questions to Pass the Exam

The correct answer is that corn flakes have a Glycemic Index (GI) of greater than or equal to 70. The Glycemic Index is a ranking of carbohydrates on how quickly they are digested and absorbed, affecting blood glucose levels. Foods with a GI of 70 or higher are classified as high-GI foods, leading to rapid increases in blood sugar levels. Corn flakes are a processed cereal that often contain minimal fiber and have been subject to processing that increases their glycemic response.

In contrast, brown rice is more complex and contains fiber, which contributes to a lower GI. All Bran is high in fiber, resulting in a GI that is also lower, as fibers slow down the digestion process. Strawberries, while they contain natural sugars, have a low GI due to their fiber content and lower carbohydrate density. Therefore, among the food options provided, corn flakes are accurately identified as having a high Glycemic Index.