Jill says, "C'est pas seulement qu'il chante... Il chante une chanson ! Les oiseaux normaux ne chantent pas des chansons." What does Jill say the birds are doing (that normal birds don't do)?

Jill says, “Il chante une chanson,” which means “He is singing a song.” She adds that normal birds don’t sing songs, so the unusual behavior is singing songs, choice A.

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