Marge's study is typical of the "Correlational" method of research.
In general, a correlational study refers to a quantitative technique for research in which you have at least 2 quantitative factors from a similar gathering of members, and you are endeavoring to decide whether there is a relationship between the 2 factors.
Colder becuase of global warming
The correct answer is omitted potential negative effects of an action
At first, the US only was on the East Coast, but with the Louisiana Purchase, the US' size doubled. It was also very cheap with an acre costing couple cents.