Could someone help me? Will mark brainlist!

How can a speaker best appeal to an audience? a. by revealing just enough information to make the au us b. by allowing the audience to ask questions about the speech's subject matter c. by adapting the speech to the expectations and knowledge of the audience d. by encouraging listeners who disagree to voice their opinions

Which conclusion about the eldest magician does this excerpt support

Evaluate the argument in president kennedy’s inaugural address for sacrificing oneself for the greater good of humanity. is this argument convincing? in what ways can we see the legacy of his request in this word today.