The answer is C, it’s the only logical answer/ explanation
Oxygen in the air can cause sliced fruit to brown, a process called enzymic browning (an oxidation reaction). Phenols and the enzyme phenolase are found in the cells of the apple, and when these are exposed to oxygen in the air, for example through slicing, the oxygen causes a reaction.
Answer: A frequently used word or phrase or it is a way to convey your thoughts, feelings or emotions.
Example: "a penny saved is a penny earned."
Sodium would have to be the most unhealthy for these fat-free food diets. Eating less sodium helps with high blood pressure issues, so eating sodium can affect that and that's why it would be the most unhealthy out of all of these.
Sugar would have to be one of the other bad ones, because its bad for your teeth and it has a bunch of calories and NO nutrients. The worst kinds of sugar are sucrose, aspartame, and high-fructose corn syrup.