According to the following text, what is mainly the significance of Barbara Jordan being chosen as a keynote speaker (paragraphs 2-4)?

But there is something different about tonight. There is something special about tonight. What is different? What is special?

I, Barbara Jordan, am a keynote speaker.

A lot of years passed since 1832, and during that time it would have been most unusual for any national political party to ask a Barbara Jordan to deliver a keynote address. But tonight, here I am. And I feel that notwithstanding the past that my presence here is one additional bit of evidence that the American Dream need not forever be deferred.
Answer choices for the above question

A. She dislikes giving speeches.

B. She is emphasizing that she could never have spoken at the Republican National Convention.

C. She plans on running for President.

D. She is acknowledging the significance of an African-American woman giving a keynote address at a national convention.