Task: Question Answering
Input (English): Stem cells are cells that can differentiate into many different kinds of cells. Scientists have discovered that the environment supporting the cells influences stem-cell differentiation. For example, stem cells grown on strong, flexible surfaces became muscle cells. What most likely happened to stem cells grown on a hard, rigid surface?   
 (A) They became nerve cells. (B) They became red blood cells. (C) They became bone cells. (D) They became skin cells.
Output (English): C