Respuesta :
The sentence "Dinosaurs have disappeared" would be a complete sentence (although not a very good one) since it has both a subject (Dinosaurs) and a verb (disappeared).
Answer: a. complete sentence.
This is a complete sentence. A complete sentence needs a subject and a verb. In this case, "dinosaurs" is the subject of the sentence, while "have disappeared" is the verb. It also conveys a full idea that can be understood without additional information. Therefore, despite the fact that it is very short, this is an example of a complete sentence.