Topic: Subject Verb Agreement,

Best Answer Explained in Below-:

The correct choice for the sentence "Neither the moon nor the stars---- visible last night" is B) "were" due to the subject-verb agreement and the grammatical structure of the sentence.

In English, when using "neither/nor," the verb typically agrees in number with the noun closest to it. In this case, the closest noun is "stars," which is plural. Therefore, the plural form of the verb "to be," which is "were," is appropriate here.

The sentence is discussing a situation that occurred in the past ("last night"), which further supports the use of "were," the simple past tense of "to be."

Options A) "was" and D) "had been" are incorrect because "was" is singular and would not agree with the plural subject "stars." "Had been" suggests a past perfect tense that is not necessary here since we are simply stating a past occurrence. Option C) "are" would be present tense, which does not fit the timeframe of "last night." Thus, "were" not only maintains grammatical consistency but correctly conveys the intended past meaning.