What describes subject-verb agreement?

• A. The branch of government that makes the laws.
• B. The use of symbols to represent ideas.
• C. The subject stays the same; the verb must be singular or plural to match the subject.
• D. A common expression that doesn't make sense if taken literally.

Answer: (C)

Subject-verb agreement means you choose a verb form that matches the subject’s number. When the subject is singular, the verb should be singular; when the subject is plural, the verb should be plural. For example, The cat sits on the mat. The cats sit on the mat. This basic rule keeps sentences clear and sounds right. The other descriptions describe different ideas (a branch of government, symbols, or expressions) and don’t capture how a verb changes to agree with its subject.