Read the following excerpt from Martin Luther King Jr's "I Have a Dream" speech:

With this faith we will be able to work together, to pray
together, to struggle together, to go to jail together, to
stand up for freedom together, knowing that we will be free
one day.

This will be the day when all of God's children will be able
to sing with a new meaning, "My country, 'tis of thee, sweet
land of liberty, of thee I sing. Land where my fathers died,
land of the pilgrim's pride, from every mountainside, let
freedom ring."

Which statement best explains why the parallelism used in this excerpt is
effective?

A. It establishes King's credibility as a leader of the civil rights
movement.

B. It presents a logical argument for fighting to achieve civil rights.

C. It encourages patriotism by evoking the memory of a childhood
song.

D. It underscores that unity is needed to achieve civil rights.