In 2009 the minimum wage reached about an hour

What would lead a historian to consider two events to have a relationship of correlation rather than causation

Choose the clause that would be used to decide each case 1. a religious school wants to receive government funding. 2. a worker who refuses to work on her religion's holy day is fired by her employer. 3. a religious organization does not pay tax on religious items! 4. the coach of a public school's sports team has players say a prayer before they take the field.

How did the environments in north america affect the development of america indian cultures in the period just before europeans arrived