You are working with a research group and discover fossils of large animal. Upon close examination, it looks to be a mammal and an ancestor to the modern tiger, that you temporarily name 'Species X' until you learn more about it. Using your knowledge of the fossil record, you attempt to determine its relative age. You know that ______ evolved before species X, ______ had already evolved and gone extinct before species X evolved, and ______ did not evolve until after species X went extinct.


A. Winged insects, Dinosaurs, Humans


B. Humans, Dinosaurs, Flowering plants


C. Dinosaurs, Invertebrates, Land plants


D. Trilobites, Reptiles, Birds