What Should You Do to Demonstrate Professional Behavior on the Job

What should you do to demonstrate professional behavior on the job?

A) Don't apologize for errors or misunderstandings because doing so calls attention to them.
B) Stay away from public arguments and disagreements, including in written documents and e-mail.
C) Realize that occasional small lies are acceptable and expected in the workplace.
D) Employees should do all of the above in order to come across as professional.