Question 3 (1 point) (03.01 MC) The table below shows the half-life of an element: Half-Life Data Element Half-Life Uranium-235 700 million years Scientists have found that the Uranium-235 content of an unknown prehistoric sample was reduced to one-fourth. What best describes the identity of the sample? (1 point) a A stone artifact that formed 700 million years ago b A mammoth that died 1,400 million years ago c A cliff that formed 1,400 million years ago d A plant that died 700 million years ago