Why Will Scholars Always Disagree About the End Product of Their

Why will scholars always disagree about the end product of their labors; that is, why will their accounts of what happened in the past always be different than other scholars'?

A) Because no two scholars have access to exactly the same source material
B) Because the past can never be empirically proved; it can only be reconstructed
C) Because it is the nature of scholars to argue
D) Because their biases will always clash