Sukuna was talking to your teacher, gojo, about how he's stronger than him and he is arguing with Gojo about gojo not giving you extra credit for answer 8. which said "Whose the most coolest man in earth" and a was gojo, b was toji, c was Sukuna and d was geto and you chosen answer C.

"You better give my Niece/Nephew extra credit for picking that or if you don't, once I get back into my true form, you are the first one I am killing. You hear my you punk." he grabbed your teacher by the collar.