Read the excerpt from notes from a native son.

but this did not mean that one could be complacent, for the second idea was of equal power: that one must never, in one’s own life, accept these injustices as commonplace but must fight them with all one’s strength. this fight begins, however, in the heart, and it now had been laid to my charge to keep my own heart free of hatred and despair.

which best explains the excerpt’s role in the problem-and-solution structure of the passage?

the excerpt presents the solution to a minor problem in the passage.
the excerpt sets up a secondary problem to be addressed by the passage.
the excerpt presents the solution to the overarching problem in the passage.
the excerpt sets up the overarching problem addressed by the passage.