Task: Question Answering
Input (English): What are the properties of the Earth's crust and mantle that are most responsible for Earth's tectonic activity?  
 (A) They are in different states and have different temperatures. (B) They are in the same state but have different temperatures. (C) They are in different states but have the same temperature. (D) They are the same state and have the same temperature.
Output (English): A