Evolutionary theories are very difficult to test, primarily because ________.
A) it is very difficult to contrast human and animal behavior
B) we don't exactly know what our ancestors were like and how they evolved
C) they completely discount the importance of environmental factors
D) there are conflicting views as to the role evolution plays in contemporary life

Question

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Evolutionary theories are difficult to test because we don't have a complete understanding of our ancestors and how they evolved. We can only make educated guesses based on available evidence.

Evolutionary Theories Are Very Difficult to Test, Primarily Because ________