Answer:
The correct answer is positive.
Step-by-step explanation:
While this is a personal question and everyone feels and acts differently at work, being positive is a good answer.
The best adjective we have to describe ourselves at work is positive, since it is something that we must maintain in a stressful situation, which is generated a lot in the work environment.
On the other hand, let's clarify what an adjective is. It is word that goes with the noun and expresses a quality of it, qualifies it, or shows a concrete or abstract property.