I believe that even amid today's mortar bursts and whining bullets, there is still hope for a brighter tomorrow. I believe
that wounded justice, lying prostrate on the blood-flowing
streets of our nations, can be lifted from this dust of
shame to reign supreme among the children of men. I have
the audacity to believe that peoples everywhere can have
three meals a day for their bodies, education and culture
for their minds, and dignity, equality and freedom for their
spirits. I believe that what self-centered men have torn
down men other-centered can build up.
- Martin Luther King Jr., Nobel Prize acceptance speech,
1964
Which rhetorical strategy is King using by repeating the phrase "I believe in
this passage?

A. Logos, to establish his credibility as an expert

B. Pathos, to engage the feelings of the audience

C. Rhetorical questions, to emphasize his point

D. Ethos, to provide evidence to support his argument