Task: Question Answering
Input (English): Structural geologists study rock formations to determine the type of environment in which the rocks formed and the events that shaped the rocks. Paleontologists study fossils found in rock formations. Scientists in both these fields have a common interest in discovering the  
 (A) history and processes of Earth. (B) elements that make up the crust. (C) types of minerals that make up sediments. (D) relationships between Earth and other planets.
Output (English): A