What does it mean for a sentence to be grammatical?

A grammatical sentence adheres to the established rules of a language, which includes proper syntax, morphology, and punctuation. These rules govern how words and phrases can be combined, which ensures that the sentence conveys its intended meaning correctly and is understandable to the speakers of that language.

Option A captures the essence of grammaticality by emphasizing the importance of following the language’s rules. When a sentence is grammatical, it allows for effective communication and comprehension among speakers and writers.

The other choices do not adequately define grammaticality. Visual appeal pertains more to stylistic choices rather than adherence to grammatical rules. Extra points on a test are irrelevant to what constitutes a grammatical sentence; grammaticality exists independently of evaluation and scoring. Lastly, stating that none of the answers are correct would dismiss the accurate definition provided by option A.