All of them are equally important. Learn all of them well. 

I can tell you that this question has been asked and answered at least half a dozen times just in the last month... THEY ARE ALL EQUALLY IMPORTANT.

All of them.

They are all important duties

All are important. You can't go half way!

They are all equally important.

All of them are required and are important.

they all are important

Inna Ivchenko nailed this one!

They are all important. Ignore or slack on one, and you might find yourself in trouble. 

All are equally important - without one, the others typically don't exist.

They're all important - hands down!

Each and every one of them! 

All of them

all are important.

Oakly Rogers - all of them!

They are all equally important.

They are all equally important.  It's like asking which of your kids is your favorite.

I will answer as I have answered before:  Choosing which fiduciary duty is most impotant is like deciding whether blood or oxygen is most important to life.  They are all the most important to properly (and legally) serve your client.

All 

Undivided LOYALTY  - w/out it you really don't have Representation

All of them

They are all important but when you put loyalty into play, all the others fall into place.

It depends on the jurisdiction.

I see this question weekly by new students, and the answer is they are all important.

I think obedience. Ultimately we work for the client. Despite that our job is to keep you out of your own way. Naw, they are all extremely important. Tell your teacher to quit making you ask this question of us.

Oakly,

Everyone has said it perfectly.  Wishing you the best of luck. A

 I agree with others by same confidentiality and loyalty ..

Loyalty.  All else follows.