Answer:
The scientist brings a caged lion cub.
Step-by-step explanation:
As class started and Dr. Dillamond gets fired, a government scientist takes over the class as the new teacher along with a lion cub inside of a cage and he explained to the class as it was mention before that animals should stay in cages because of their own and other safety, all this coming from the recent loss of rights for animals discriminated by the wizard of oz. These event makes Elphaba extremely angry and triggers her magic abilities within the classroom.