They are ALL important.  
I wish you all the best with your real estate studies. 

They all are.

Sorry Alex, this is harsh truth vs. polite tolerance: 

THIS IS THE MOST OVER ASKED QUESTION HERE in our Q&A, please review the AR achieves, you'll find some good answers amongst the sarcasm (caused from our burnout brought on by the students not doing any research - just landing here asking the same 10 questions day after day for years in our Q&A). Our achieves are robust, query your questions before asking them.  Good Luck in your studies. 

All of them are important if you wish to stay out of trouble and maintain your reputation. 

If you need to ask this question, you may wish to select another career path. 

Loyalty...

with loyalty will come confidentiality, full disclosure etc...and other good things. If you are loyal, you will tell the truth.

Without it, you have NOTHING.

Eve

All of them are of equal weight. None more important than another

Lose the word "most". The care of another requires much. Give all you have

They are like the ten commandments... which one do you want to break Alexandria Wentland ?

The obligation because it's the law.

All of them are to be implemented consistently to avoid trouble ahead.