Which sentance shows the verb in correct agreement with the subject?

I have narrowed it down to these two sentences:

A. Peggy or Phyllis drive me to Florida every winter.

B. Not only the muffler but also the spark plugs need to be replaced.

I want to go with A, but B also sounds correct, although it missing a comma or two...

1 answer

No. B is correct. The subject 'spark plugs' needs a plural verb.