Answer:
D) the need to address injustices still to be righted during the Civil Rights Movement.
Step-by-step explanation:
"Five score years ago" this is a reference to 100 years ago the emancipation proclamation was signed and to this day America is still suffering from racism and segregation, his way of protesting the events that happend in his time, places and restaurants that were exclusive to some white people, was remembering that eventhough a 100 years had passed, they still had a long road ahead to a free life with no racism or segregation.