Task: Question Answering
Input (English): A rock formation in a land area contains fossils. Over time, tremendous heat and pressure change the formation to produce a harder rock formation without fossils. Which change in rock type has occurred in this land area?  
 (A) Igneous rock has turned into sedimentary rock. (B) Igneous rock has turned into metamorphic rock. (C) Sedimentary rock has turned into igneous rock. (D) Sedimentary rock has turned into metamorphic rock.
Output (English): D