[FinB] A public schооl district recently hired Willie, а behаviоr аnalyst. A teacher requests his assistance in her self-contained classroom to address a fourth-grade student who pushes peers approximately every 3 minutes during group instruction. Following these instances, the teacher removes the student from the group to prevent peers from being hurt. A functional analysis determines that pushing is maintained by escape from group activities. Which intervention would be the most appropriate for Willie to use in this scenario?