Please choose the correct answer to the question: A woman is digging under a tree on a tall mountain. She is looking for interesting rocks, and a foot down into the soil, discovers a fossilized fish skeleton. From this discovery, the woman is able to determine that

Answer1: the mountain used to be underwater Answer2: some bears in mountains eat fish Answer3: some fish can climb mountains Answer4: sometimes rain can move fish to high spaces

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