15. In which sentence do you find subject-verb agreement?
A. Where is your keys to my car?
B. Farley or Farley's brother is helping me with the project.
C. Neither the clarinets nor the trumpets plays the melody correctly.
D. If you look carefully, you'll see tomatoes is on that aisle.
B. Farley or Farley's brother is helping me with the project. When nor or or is used the subject closer to the verb determines the number of the verb. Whether the subject comes before or after the verb doesn't matter; the proximity determines the number.