When an informative speaker is careful to avoid jargon and acronyms the audience may not be familiar with, they are observing which characteristic or trait of good informative speaking?

Familiar Language.

Explanation:

Public speaking is a method of communication where a single speaker is giving a speech to a group of people.

When conducting a public speech, a speaker needs to consider the audience he would be speaking to, and ensure that the language he uses is clear to them avoiding acronyms and jargons that his audience is not familiar with: this is a good speaking quality known as the use of familiar language.

the answer is b. an opposing veiwpoint

explanation:

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