Probably a water-soluble vitamin like C.
The correct answer is letter a. The body takes a lot of time and energy for our body to break down more complex foods, while simple foods are broken down more quickly and easily absorbed by the body. Complex foods contain more ingredients and more nutrients that are hard to be broken down, not like simple foods, such as candy or sugar that can be easily broken down by the body because of its simple structure.
because they work with a lot of people and they know when they see someone unhealthy
