Fill in the blank with the most appropriate word.The computer ________ guaranteed by the company.

Answer: Option A

In this sentence, the subject "The computer" is singular, and therefore, the appropriate verb form to use is "is," which agrees with the singular subject.

Option B: are
This option is incorrect. "Are" is used with plural subjects, and it doesn't match the singular subject "The computer."

Option C: it's
This option is incorrect. "It's" is a contraction of "it is," and it doesn't fit grammatically in this context where a simple verb form is required.

Option D: aren't
This option is incorrect. "Aren't" is a contraction of "are not," and it is not appropriate for the sentence's singular subject and verb agreement.

The correct answer is Option A: is, which accurately matches the singular subject "The computer" and maintains proper verb agreement.