Which of the following actions can lead to the cancellation of a customs agent's patent? a) Failure to pay taxes and compensatory fees. b) Carryi...

Which of the following actions can lead to the cancellation of a customs agent's patent?


a) Failure to pay taxes and compensatory fees.
b) Carrying out customs clearance procedures without the permission of the competent authorities or without the allocation of quotas, when required, or without making the total or partial discharge on the permit or quota before activating the automated selection mechanism.
c) Dealing with prohibited import or export goods.
d) All of the above.