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...

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

To determine which sentence shows the verb in correct agreement with the subject, let's break down each sentence and analyze the subject-verb agreement.

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

In sentence A, the subject is "Peggy or Phyllis." It is a compound subject because it consists of two nouns joined by the conjunction "or." The verb used in this sentence is "drive," which is the correct form of the verb for plural subjects. Since there are two possible drivers, "Peggy or Phyllis," the plural verb "drive" is appropriate. Therefore, sentence A demonstrates correct subject-verb agreement.

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

In sentence B, the subject is "Not only the muffler but also the spark plugs." It is also a compound subject connected by the conjunction "but also." In this sentence, the verb used is "need," which is the plural form of the verb. Since both the muffler and the spark plugs require replacement, the plural verb "need" agrees with the plural subject. Thus, sentence B also demonstrates correct subject-verb agreement.

Regarding your concern about missing commas in sentence B, it is important to note that the use of commas does not affect subject-verb agreement. Commas are used for clarity and to separate elements in a sentence. In this case, though the sentence could benefit from added punctuation, the subject-verb agreement remains intact.

Therefore, both sentence A and sentence B show the verb in correct agreement with the subject.