Which one of the following words or phrases is the superlative form of an adjective?

What does a change in medium allow the audience to do?

Which two pieces of evidence support the idea that coal is underutilized? this was on study island about coal

Maria is writing a persuasive essay for her english class. she asks marshall if it is important to use rhetorical appeals in her essay. which reasons could marshall give in favor of using rhetorical appeals