Which statement accurately summarizes the Alvarez asteroid impact theory of dinosaur extinction?

(1)An asteroid struck Earth, altering the environmental conditions and leading to the extinction of many species, including dinosaurs.

(2)Changes in global temperatures imposed stress on the dinosaurs and they could not adapt fast enough to survive and reproduce.

(3)All dinosaurs lived in an isolated area. An asteroid struck this area, killing many dinosaurs. There were not enough survivors to maintain the species over time.

(4)Dinosaurs that ate plants competed for food with too many other organisms. Due to their size, they could not find enough food to survive.