Which of the following has the highest sucrose content?

Cough syrups often have the highest sucrose content among the choices listed. Sucrose is commonly used in cough syrups as a sweetening agent to improve the taste, especially since many active ingredients can have a harsh or unpleasant flavor. The addition of sucrose helps to make these medications more palatable for patients, particularly children, who might be more sensitive to taste.

Ice cream does contain sucrose, but its sugar content is balanced with fats and dairy ingredients. Canned juice can also have added sugars, but the overall sucrose content may not be as high as that found in cough syrups, especially when those juices are labeled as "100% juice" with no added sugar. Breakfast cereals often contain sugar, but they can vary widely in formulation, with some being lower in sucrose than others, especially if they are marketed as healthier options.

Thus, cough syrups typically have a much higher concentration of sucrose to enhance flavor and improve compliance among patients, making them the option with the highest sucrose content.