Regarding Wrongful Convictions

Regarding wrongful convictions:

A) from 1973 to 2017, over 50 percent of the 160 people who were wrongly convicted and sentenced to death, yet were later pardoned, acquitted, or had the original charges dropped, were black.
B) one review of 1900 defendant exonerations for murder, sexual assault, and drug crimes up to 2016 found that African Americans were nearly half of those wrongly convicted and later exonerated.
C) Both a and b