What does ariel do that causes stephano to attack trinculo

What Ariel does that causes Stephano to attack Trinculo is to interrupt Caliban's narrative.

Explanation:

Ariel enters the scene invisible, while Stephano has a conversation with Caliban.

During Caliban's story, Ariel shouts "Thou liest; thou canst not."

Caliban automatically attributes that saying to Trinculo, and Stephano warns him to stop interrupting him.

Caliban continues with his story but Ariel returns to say "Thou liest", which induces the anger of Stephano, who ends up hitting Trinculo, believing that it was he who was interrupting.

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i would think its c but i'm not sure