John is a new second-grade student in a special education class. He has a Section 504 accommodation plan because he frequently has seizures. John just had a tonic-clonic seizure in the classroom. Which of the following steps should the special education teacher take first?

A. Teach the class what a seizure is and describe expectations for student behavior if John has another seizure
B. Have the classroom assistant walk John to the school nurse to be checked
C. Document the seizure and inform the necessary school personnel and the student's family
D. Encourage the student to go to physical education now that the seizure is over