Why Has One Historian Described Violence as "An Intrinsic Part

Why has one historian described violence as "an intrinsic part of western society" during the years following the Civil War?

A) Violence was part of the fabric of life, from range wars to an increase in crime, including illegal lynching.
B) Though the image of the violent West was greatly inflated by "Wild West" performers, it was seen as fact by Easterners and became part of the larger mythology of America.
C) Most western settlers after the Civil War had been scarred by their military experience.
D) The violent interactions between white settlers and Indians set a tone for western settlement that never diminished until the Indians were finally subdued.