through agent and many time i asked him about it he always said dont take worry about it..High possibility.
Now, please do not lose even one minute. You must immediately send the IRCC web form to the Abu Dhabi visa office. Give the complete details (your application number, name, passport information.... details of your US visa refusal).
You must apologize for this unintentional mistake + mention you had misunderstood the question + you are now giving this information on your own without IRCC requesting for it
Did you apply on your own or through an agent?