What Was One of the Major Differences Between the Resources

What was one of the major differences between the resources available in the Americas and those in Asia and the Mediterranean?

A) American Indians domesticated plants whose caloric output was greater than any of the grains raised in Europe or Asia.
B) American civilization never developed the means to construct the types of monumental architecture found in other civilizations.
C) American civilization had greater access to animal power than did the civilizations of the Old World.
D) Due to the difficult topography in which they developed, American civilizations did not establish sedentary agriculture.