Which of the following is an example of negative reinforcement? Nelson twists Milhouse’s…

Which of the following is an example of negative reinforcement?
Nelson twists Milhouse’s arm, and Milhouse gives Nelson his lunch money. Nelson twists Milhouse’s arm every day before school
Peter no longer drinks expresso in the morning before his kids leave for school because they refuse to kiss him with “expresso” breath
Donnie’s teacher makes him write “I will not bully others” 100 ?times on the board when he calls his classmate a loser. Donnie never calls his classmate a loser again
Julian continues to put his fingers in his nose because his math teacher always sends him to the bathroom to wash his hands after he picks his nose