(A) As a Supreme Court justice, Thurgood Marshall (B) was known for his quest to end racial discrimination, his (C) opposition to the death penalty, and (D) he supported free speech and civil liberties. (E) No error.
Thurgood Marshall was known for his skill as a lawyer and his passion for civil rights...he has fought for the advancement of colored people...the answer is B-his quest to end racial discrimination.