PLEASE HELP!! Which excerpt from President Lincoln‘s Gettysburg address that reflects the union goal of guaranteeing equal rights for African-Americans?

A. It is for us the living, rather, to be dedicated here to the unfinished
work which they who fought here have thus far so nobly advanced.

B. Our fathers brought forth on this continent, a new nation ...
dedicated to the ſidea] that all men are created equal.

C. We have come to dedicate a portion of that field, as a final resting
place for those who here gave their lives that (our) nation might
live.

D. Government of the people, by the people, for the people, shall not
perish from the earth.