Identify Which of the Following Is Not an Explanation of Why

Identify which of the following is not an explanation of why the value system in the United States is unique.

A) Geographically, the United States has been relatively isolated for most of its history.
B) Historically, the United States has been unique; it was founded by a revolution that grew out of opposition to tyranny and aristocracy.
C) Religiously, the Judeo-Christian ethic has emphasized humanitarians, the worth of the individual, etc.
D) Culturally, the United States has been peopled largely by immigrants who shared a common culture.