It refers to Social Studies as it provides a an advice and a means for coping with difficult situations: it's happened before and we can learn from the past with respect to good and bad decisions.
It was called the New Frontier
I believe the answer is: all three - age, class, and our place in history - because those are all ways in which society guides college attendance
In almost all societies, we have age requirement before we can fill out college application. Our palce in history is strongly correlated to the type of class that can enter college. In the past, only people with strong nobility background have the right to enter college, nowdays all classess of citizens have the right to enter college.
To complete the given sentence or statement the first and second answer will be the parents need to worry more about their children's exposure to wood smoke than their exposure to carbon monoxide, if the 2010 study of children in western Canada is accurate.