Answer:
Option C integrity.
Step-By-Step Explanation:
The best attribute for an office professional to have is Integrity
Because if you are following integrity you will be in ethical manner whoever say anything to you.Your mind will not make you to lose your values which is the most important thing in anybody's life.
If you do not have integrity you may lose and you lose your temper you will get quite or pretty much aggressive and you may get fired.