Question sur la grammaire et la structure. Quels aspects du programme avez-vous ...?
Answer Details
The verb "avez-vous" is in the second person plural form, which means the subject is addressing a group of people. The main verb in the sentence should agree with the subject in terms of number and person.
In this case, the correct form to match with the subject "vous" (you all) is "retenus," which is the past participle of the verb "retenir" in the masculine plural form. The sentence translates to "What aspects of the program have you retained?"