Please choose the correct answer to the question: Scientists claim that the area around the Grand Canyon was once covered by an ocean. What evidence would support their claim?

Answer1: Dinosaur footprints were found near the Grand Canyon. Answer2: Fish were found living in the rivers of the Grand Canyon. Answer3: Fossils of ocean animals were found at the Grand Canyon. Answer4: Bones from desert animals were found at the Grand Canyon.

Answer format: answer1/answer2/answer3/answer4
Answer: answer3