Why does king repeat the phrase "i believe" in this passage?

The correct answer is option letter A (to engage the audience's feelings). Taken from the Acceptance Speech by Martin Luther King Jr. (1964), the phrase “I believe” is used several times in order to give pathos expressions in his speech, that is, to stir up emotions of hope through his words. Pathos is a very useful tool to persuade others and engage audiences in speeches or arguments. In fact, that was what Martin Luther King Jr. wanted to do, to demonstrate the great role that the Civil Rights movement played during that time.

A.To engage the audience's feelings

APEX

i don't really know the circumstances. i personally think not due to it not being fair for all parties and how hated i'd become if i thought it was a good thing.

i think the answer would mist likely be an adjective clause, because unhappy is an adjective.