Final answer:
The central message of Mrs. Obama's speech is best represented by Option A, which speaks to the willingness to help students and the expectation that they will support others in the future, aligning with the theme of collective responsibility and contribution to the nation's progress.
Step-by-step explanation:
The central message of Mrs. Obama's speech appears to resonate with the themes of hope, responsibility, and the importance of contributing to the future of one's community and country. Looking at the provided excerpts, it seems that Option A, which states "There are people eager to help the students today, just as the speaker hopes they will support others in the future," might best capture the overarching message. This aligns with the notion of pursuing the happiness of people, as mentioned by Johnson, and the collective responsibility underscored in the discussions about the American Dream and societal challenges.
The speech passages that reference current generation graduates and the challenges they face align with the notion that many today are eager to assist, as was the guidance provided through historical speeches and political campaigns. The references to past challenges, the dedication to enriching American civilization, and the commitment to inclusiveness and diversity also support the concept that today's students are meant to be future supporters of the nation's progression.