Please choose the correct answer to the question: Jennifer has collected rocks while hiking. As she attempts to classify her rocks, which will she put in the pile of sedimentary rocks?

Answer1: Black-and-gray crystalline rocks Answer2: Shiny rocks with smooth textures Answer3: Rocks with visible pieces of shells in them Answer4: Rocks with small interlocking crystals in them

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