What does Turner mean when he says that American development has "exhibited advance along a single line, but a return to primitive conditions on a continually advancing frontier line"? How has this frontier line allowed Americans to "modify and develop" their European influences?

he would based it upon geographic luck which he often resulted his faith in.

calvin taught his followers that human beings needed to follow strict rules to overcome their nature and do good. second choice

the outcome of 1970 oil crisis in united states was that, they began to search ways on how to reduce oil.

in 1970 was a period when there were energy and oil crisis. those who were major centers for industrialization were forced to keep way from supplying of petroleum.

some of the result of this crisis was economic growth became stagnant because prices of oil surged.

due to the increased prices some countries like mexico and norway benefited.