Define "hidden sugars."

"Hidden sugars" refer to sugars that are not immediately obvious in food labels, making option C the correct definition. These sugars are often incorporated into processed foods under various names, which can mislead consumers about the food's actual sugar content. While a label might not explicitly state "sugar," these ingredients can include syrups, honey, molasses, and even terms like sucrose or high-fructose corn syrup. This misrepresentation can lead individuals to unknowingly consume higher amounts of sugar, which can contribute to various health issues, including obesity and diabetes.

The other options do not accurately capture the essence of hidden sugars. Sugars that are immediately obvious on food labels are not considered "hidden," as their presence is clear to consumers. Sugars found in fruits are natural and typically not hidden; they are recognized as part of whole foods. Lastly, sugars in whole grains are also not what is referred to as hidden sugars, as whole grains typically contain naturally occurring sugars in smaller quantities and are generally considered part of a healthy diet. Thus, the term "hidden sugars" specifically points to those that are less perceptible to consumers, emphasizing the importance of careful label reading to identify potential excess sugar in diets.