I mean they are necessary for some people..
Not sure about eating them
The answer is B: Some patients who have a poor hospital experience also have post-surgical complications.
This because this can't be a cause and effect because it's a survey study, and only 40% of the people who have poor hospital experience also have post-surgical complications.
In humans, dehydration in a significant loss of water in the body and there’s extreme side affects. But in general, dehydration is the loss or removal of water
True, exercise in general reduces the diseases.