Correct Answer:
C. is
The correct answer is "is". This question tests your understanding of subject-verb agreement, specifically when a phrase like "along with" is used. In sentences where a singular subject is followed by a phrase introduced by "along with," "as well as," "in addition to," or "together with," the verb must agree with the main subject, not with the noun in the modifying phrase.
- The main subject: The true subject of the sentence is "The principal," which is singular.
- "along with teachers": This is a prepositional phrase that modifies "The principal." It does not change the number of the main subject. Think of it as extra information, similar to putting the phrase in parentheses.
- Singular verb: Since "The principal" is singular, the verb must also be singular. "Is" is the singular form of the verb "to be" in the present tense, making it the correct choice for a singular subject performing an action currently.
Therefore, the sentence correctly reads: "The principal along with teachers is attending the meeting."