When Speaking with an Unfamiliar Audience Made Up of Nonnative

When speaking with an unfamiliar audience made up of nonnative English speakers, you should

A) talk clearly and use simple words and sentence structure.
B) be sure to include plenty of slang to make your language colorful.
C) talk exactly as you would to a native English speaker so as not to make the nonnative speakers feel singled out.
D) use simple yes/no questions to make it easy for them to answer.
E) avoid trying to confirm understanding so that you do not embarrass them.