Which of the following statements about black Americans' electoral power in the 50s and 60s is LEAST accurate?

A) In some northern states and cities,black voters represented a significant electoral bloc which could swing close elections.
B) Despite the gains they made in state offices and appointed positions,African Americans failed to win any seats in the U.S.Congress.
C) Several dozen black politicians served in northern state legislatures during this period,but none served in southern ones.
D) African Americans were appointed to a number of prominent federal positions during this period,including solicitor general and circuit court judge.