Task: Question Answering
Input (English): A student made observations of four rock samples. Which of these observations most likely describes a sedimentary rock?  
 (A) Sample 1 has bands of light and dark crystals. (B) Sample 2 has pink, gray, and white crystals grown together. (C) Sample 3 is made up of one huge, pale pink crystal. (D) Sample 4 is made up of layers of sand grains cemented together.
Output (English): D