The Position of Mammals in Evolution Is Best Described as

The position of mammals in evolution is best described as

A) they dominate life in the sea.
B) they were among the first animals to live on land and their variety outstrips all living things known.
C) they arose from mammal-like reptiles in the Triassic but remained small and insignificant while dinosaurs dominated the land.
D) mammals gave rise to birds.
E) mammals have been present since plants and other organisms first appeared on land.