How long have humans walked earth particularly north America

Which of the following terms could be applied to the non-aligned nations during the cold war

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.

Which product would have been most likely to have been traded in this area at this time?