Dinosaurs ate plants. Dinosaurs were eaten by the mammals. Dinosaurs lived on Earth before the mammals. Dinosaurs and mammals lived at the same time.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Scientists find dinosaur fossils in the bottom rock layers of a cliff and mammal fossils in the middle rock layer of the cliff. Which could best be concluded from this evidence?
Possibilities:
- Dinosaurs ate plants.
- Dinosaurs were eaten by the mammals.
- Dinosaurs lived on Earth before the mammals.
- Dinosaurs and mammals lived at the same time.

Dinosaurs lived on Earth before the mammals.