Answer
The main assumptions of the argument are that a high number of the population of minors will be affected by the amount of lead in the area. This is a relatively reasonable answer, although having a higher amount of the "safe" dose doesn't always result in the side affects mentioned.
Work Step by Step
The main assumptions of the argument are that a high number of the population of minors will be affected by the amount of lead in the area. This is a relatively reasonable answer, although having a higher amount of the "safe" dose doesn't always result in the side affects mentioned.