In the context of dietary management, especially for individuals trying to control their blood sugar levels, it is crucial to be aware of all sources of sugar intake. Bahija has taken several steps to reduce her sugar consumption, such as eliminating desserts, avoiding adding sugar to her cooked foods, and switching to diet sodas instead of regular ones. Despite these measures, her blood sugar levels have not improved. This suggests that there may be other sources of sugar in her diet that she has not yet addressed. Among the options provided, diet soda, vegetables, and dairy products are less likely to be significant sources of added sugar. Diet sodas are specifically designed to be low in sugar, vegetables are generally low in sugar unless they are in a dish with added sugar, and dairy products can be low in sugar if they are not sweetened. However, commercial foods often contain hidden sources of sugar, such as high-fructose corn syrup, which can contribute to elevated blood sugar levels even if they are not immediately obvious. Therefore, it is most likely that commercial foods are the additional source of sugar contributing to Bahija's sugar intake.
【Answer】: Commercial foods
