Transform the sentence 'La chorale chantera les hymnes' into the passive voice.

Question 20:
The active sentence "La chorale chantera les hymnes" (The choir will sing the hymns) is in the future simple tense. To transform it into the passive voice, we use the structure: subject + être (in the same tense as the active verb) + past participle of the active verb + par + agent.
"Les hymnes" (the hymns) becomes the subject. "chantera" (will sing) becomes "seront chantés" (will be sung), agreeing in gender and number with "les hymnes" (masculine plural).
The correct passive form is "Les hymnes seront chantés par la chorale."
$\boxed{\text{A. Les hymnes seront chantés par