They are all equally important.  Would be like asking which of the 10 commandments is more important.

I don't think any one of them is more important than the other.

They all are equally important.

Hope your class went well.

Every one of them

Keeping the clients business confidential is the most imporant fiduciary duty, in my book.

As the list here flows it begins with dealing honestly and fairly. No explanation necessary!

Honesty. You have to tell it like it is because it is linked to credibility which is linked to character connected to trust and finally intimacy the prize of all

It is important not to share confidential information and this is a common violation by many real estate agents.

Truth

Spencer Coleman Richard Weeks and Annette Lawrence , Palm Harbor, FL 727-420-4041 answered your question. Are you also doing a school project?

Richard Weeks responded correctly.

FIduciary:Law. a person to whom property or power is entrusted 

for the benefit of another

Any violation of fiduciary responsibility can get an professional sanctioned, revocation of license and possible criminal/civil prosecution.

Your question is like asking what part of landing a plane is most important? 

A professional needs to KNOW  ALL OF THEIR FIDICIARY DUTIES and never cast their shadow across the line.

Fiduciary duties of a real estate agent:

Loyalty

Confidentiality

Full Disclosure

Although "honesty" is expected, it is not a main one...it falls under full disclosure.

Eve

The word FAIR has been removed from the code of ethics.

Honesty