Question

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

Answer 1

The correct answer is C, because 'neither' always agrees with the verb in singular form.
The other options are grammatically incorrect:
A - where ARE your keys
B - Farley or Farley's brother ARE helping me
D - tomatoes ARE on that aisle

Answer 2

D. If you look carefully, you'll see tomatoes is on that aisle