In which sentence is the parentheses correctly used?

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

Read the excerpt from it's our world, too! : young people who are making a difference.the author’s purpose in this excerpt is to

What is a word that is stronger than "beautiful"