During the start of a class an instructor uses jargon and acronyms that are familiar to most of the learners and that are part of the course content. Which of the following BEST describes what the instructor is doing? 

Answer options:

A. The instructor is establishing credibility and using appropriate communication skills.
B. The instructor should avoid using jargon and acronyms before explaining them because it could confuse the learners.
C. The instructor is establishing credibility but is not using appropriate communication skills.
D. By using jargon and acronyms the instructor is being arrogant and showing off their skill level in the subject matter.

A