Task: Question Answering
Input (English): Imprints of the shells of ocean clams are often found in the rocks of the Appalachian Mountains. What do these imprint fossils most likely indicate?  
 (A) These mountains were once under the ocean. (B) These mountains once had a more rainy climate. (C) Mountain river clams evolved from ocean clams. (D) Ocean clams evolved from mountain river clams.
Output (English): A