Zeke is a medical assistant at Bedford Clinic. His primary job responsibility is working with Dr. Garcia, but Dr. Garcia is currently on vacation, so Zeke's duties are light today. He notices that the two medical assistants in the reception area are swamped with work, so he offers to lend a hand. Zeke is exhibiting the professional behavior of ____. 

A. critical thinking
B. teamwork
C. punctuality
D. judgment
E. attendance

B. teamwork
By helping other team members, Zeke contributes to the overall efficiency of the office.