I believe the answer to be B.
Explanation:
It would appear to me that Roosevelt wants the citizens to take action as just being optimistic will not help in the reality of the situation.
broad topic isn't exactly what you want in a presentation, you usually want to have a very narrowed topic, focusing on something specific.
Detains and examples are very important, so check that. You always need multiple sources.
A cited list is also very important, because it's technically illegal to not have one if you used any info from somewhere else besides your own brain.
D isn't important at all
E could be important for the working progress phase, but for the presentation itself, it's not really needed.
Answer:
to make the sentence correct and effective
Explanation:
hope it helps