Answer:
it is B, american flag
Explanation:
if you think about it, the star--spangled banner.. is the american flag 'cause it talks about stars....
Stout pretty much means strong. When added to the word brave, it's clear that "our hearts" face fear head on, with a strong, unfearing willpower.
Tone is the author's attitude toward the speech. Since we know that Dr. King was the author and presenter of the speech, this was one of inspiration, seriousness, hope, and encouraging. This is not to be confused with mood. Mood is your feelings from the text. So, while the tone may be one of hope, to say it was 'hopeful' would be a mood (if that is indeed what you are feeling when hearing it.)