Task: Question Answering
Input (English): There are several different types of rock. Each type of rock is formed under different conditions. How are sedimentary rocks, such as shale and sandstone, formed?  
 (A) Particles are heated by the Sun. (B) Particles are melted together by magma. (C) Particles are compressed into layers. (D) Particles are changed into liquids.
Output (English): C