Topic: Subject Verb Agreement,

Best Answer Explained in Below-:

The correct answer to the sentence "Last year, one of the major --- load shedding." is actually **B) problem was** rather than **C) problems was**.

Let's break down this sentence to understand why. The phrase "one of the major" implies that we are referring to a singular subject, which would be "problem." Hence, the complete phrase should accurately convey that last year, load shedding was one of the major problems encountered.

Thus, "was" is the appropriate past tense verb form used to describe a past event (load shedding occurring last year). The phrase would read: "Last year, one of the major problems was load shedding."

Using "problems" with "was" (as in option C, "problems was") is grammatically incorrect because "problems" is plural, and it should be paired with the plural verb "were." Therefore, option B ("problem was") maintains both the subject-verb agreement and correctly reflects the intended meaning of the sentence about last year's situation.