During the Years of the Black Death, the Flagellants Were

During the years of the Black Death, the flagellants were

A) a group of inquisitors ferreting out the causes of the disease.
B) French officials who punished criminals.
C) foods believed to have caused the disease.
D) groups of self-scourging penitents originating in Hungary.
E) used by the church to crush local civil powers critical of the church.