Which sentence is written correctly with subject-verb agreement?

neither the public prosecutor nor the defense lawyer was happy with the case's outcome.

not one out of twenty mathematicians were able to solve the problem set before them.

one of the new students in my class are educated at a school in switzerland.

i agree, but what is the question here?

explanation:

the puthmans reverned parris danford and harthone

it shaped life in both positive and negative ways. the positive sides of the medieval government was that it had a very strong and military. the citizens felt safer because of the high military interference. the citizens also had a positive attitude towards the artisan class and gave a huge respect to them. there is also a negative side of the government where the government would use the military too much on its citizens which created a sense of autocracy. it was oppressive to the peasants especially to the women.