Bad hygiene, puberty, physical activity or just normal teenage bodily changes.
It would be A It does not state how much weight needs to be lost
<span>a morbidity survey of the general population, like the national health interview survey</span>
Cereal companies are blamed for putting too much sugar into their products, which causes obesity. This is bad for them, as it would stop people from bying their products. So they would have an interest in study showing that this is not the case: the study would be a self-interest study (the correct answer) and therefore not be reliable
B.) The variable
the constant (stays the same)
Hypothesis (what you think will happen
