Task: Question Answering
Input (English): Which of the following is a crucial piece of evidence supporting scientists' theory of how the continents and the ocean basins formed?  
 (A) Gravitational forces result in the fusion of small atoms. (B) A differentiated iron core expresses magnetic properties. (C) Currents redistribute heat in an unevenly heated liquid. (D) A stream of charged ions disperses lightweight gases.
Output (English): C