Answer:
No; the study is based on a volunteer sample, which may be very different from a randomly selected one.
Explanation
Her plan cannot be effective because she could base her own judgenent on samples that was randomly selected for consideration.
The body's primary source of energy is the nutrients from food and also water but mostly food <span />
<span>Environmental I believe is the correct answer.
hope this helps!</span>
D) there are no processed foods in African cultures.
Loss of sleep is a possible sign and effect of stress.
This statement is true. Anxiety and depression are also common signs of stress.
I hope it helps, Regards.
