Which agreement rule applies to a subject joined by or or nor?

a.) use a plural verb
b.) use a singular verb
c.) make the verb agree with the subject closest to the verb
d.) make the verb agree with the first subject listed

I believe the answer is: C.) make the verb agree with the subject closest to the verb

In this case, the word 'agree' means having. the same number, gender, case, or person as Examples these sentences could be seen below:
- Either the Crooks or the liar will win the united states election this year.
- I voted for neither the Crooks nor the Liar.

Akajhnanananjjijii