You measure a sample of tap water and discover that it contains 0.007mg dichloroethylene per liter. Would you consider this to be a dangerous level of this toxin, or an acceptable level? Justify your
answer.

I think the correct answer from the choices listed above is option A. The government structure that states use is the federal system. It is the government of the fifty states that constitutes the United States. It has three branches - legislative, executive, and judicial.