one or more answers are correct.

For each citizen, on May 1 , the Internal Revenue Agency automatically prepares the pre-filled tax declaration, which is made available in the citizen's personal area. The citizen must view and, if necessary, edit, and finally approve and submit the declaration by the deadline defined by the Agency. Then an Agency official validates what has been sent. Which of the following sentences are correct? Scegli una o pi alternative: (a) It is possible that the validation is not performed. (b) The start timer in the lane of the Agency allows to prepare all declarations. (c) The validation can happen before the deadline. (d) The validation must happen after the deadline. (e) The approval can happen after the deadline