It means that throughout history one main perspective or viewpoint has been shown off or presented as fact while others have been ignored. The Caucasian perspective. However this quote is also an opinion and should NOT be taken as fact.
Prior to the Civil war, the West attracted many immigrants because land was cheap and it was seen as the land of opportunity. The correct option among all the options that are given in the question is the first option. There were many forested lands and those when cleared can proved good for cultivation.
The northern tower (first) was hit at 8:46 am.
The southern tower (second) was hit at 9:03 am.