Task: Question Answering
Input (English): The following mathematical expressions represent four different concentrations of a chemical solution to be used in a science experiment. Which one is equal in magnitude to 1/1000?  
 (A) 1.0 x 10^3 (B) 1.0 x 10^4 (C) 1.0 x 10^-3 (D) 1.0 x 10^-4
Output (English): C