Answer: Based on his behavior during the supreme ordeal
Hope it helps if not tell me : )
it is appropriate to break the rule that requires subjects joined by and to use a plural verb when either and neither are subjects. They always take singular verb.
For example :
Either of us is capable of doing the job
Answer: Did the first 10 kids go to the restroom when leaving the classroom?
Did the first 10 kids that left the classroom seem approachable
Explanation: