Please choose the correct answer to the question: Which statement is the best description of what happens in the rock cycle?

Answer1: Rocks on old mountains are gradually weathered away while mountain building and volcanism form new mountains. Answer2: Once formed, rocks stay in place until rocks above them are weathered away, and they reach the surface. Answer3: As sedimentary rocks are buried deep below other rocks, they are changed by heat and pressure, eventually return to the surface, and are weathered again. Answer4: Younger sedimentary rocks are always deposited on top of older metamorphic or igneous rocks.

Answer format: answer1/answer2/answer3/answer4