Read the excerpts from "Wrongful Convictions” by Jon Gould and Just Mercy by Bryan Stevenson. "Wrongful Convictions”

When the eyewitness is simply making a mistake—"Look, I was there, this is what I saw, I have no motive to lie”—it’s simply the usual problems with eyewitness identification: lighting, the ability to do cross-racial identifications, the emotional anxiety we have in the midst of a crime.

Just Mercy

We also make terrible mistakes. Scores of innocent people have been exonerated after being sentenced to death and nearly executed. Hundreds more have been released after being proved innocent of noncapital crimes through DNA testing. Presumptions of guilt, poverty, racial bias, and a host of other social, structural, and political dynamics have created a system that is defined by error, a system in which thousands of innocent people now suffer in prison.

Which claim could be supported by both excerpts?

Human error has led to an abundance of wrongful convictions.
Racial and personal biases are the leading causes of wrongful convictions.
Eyewitness accounts have led to far too many wrongful convictions.
DNA testing is a common means of overturning wrongful convictions.