Consider the following statements about flaky rocks: 1. Flaky rocks are formed by the aquatic system on the earth's surface. 2. The formation of layered rocks involves the erosion of pre-existing rocks. 3. Flake rocks contain fossils. 4. Clay rocks are typically found in layers. Which of the above statements are correct?

• A. 1 and 2
• B. 1 and 4
• C. 2,3 and 4
• D. All of the above