Its obviously wrong. And the right desicion is to say no, and try to explain that it is wrong for them to even have it. But its your own desion, just try to make the right one.
The most likely to occur is depression. While the other two symptoms may appear, depression is a common mental impact after a traumatic event happens to a child. Treatment of this effect can be via therapy and/or depression medication though not necessary.
The answer is true, you can get healthier off drinking water