Which event is a part of Prospero and Ariel's plan to prevent Caliban, Stephano, and Trinculo from attacking Prospero?

AProspero and Ariel sneak away after sending mystical spirits to perform a dance for Caliban, Stephano, and Trinculo.
BProspero and Ariel use Miranda to lure Caliban, Stephano, and Trinculo into a prison cell.
CProspero and Ariel make themselves invisible so they can observe the actions of Caliban, Stephano, and Trinculo in Prospero's cell.
DProspero and Ariel drug Caliban, Stephano, and Trinculo into a deep sleep with a magical wine.

Verified Answer :

The correct answer for the question that is being presented above is this one: "c. Prospero and Ariel make themselves invisible so they can observe the actions of Caliban, Stephano, and Trinculo in Prospero's cell." The event that is part of Prospero and Ariel's plan to prevent Caliban, Stephano, and Trinculo from attacking Prospero is that Prospero and Ariel make themselves invisible so they can observe the actions of Caliban, Stephano, and Trinculo in Prospero's cell.