Task: Question Answering
Input (English): Question: If a lies in the range (-2,1) then which of the following statements must be true?

 Option A: a^4 >a^3 > a^2 > a

 Option B: a > a^2 > a^3 > a^4

 Option C: a^4 > a^2 > a^3 >a

 Option D: a^2 > a^4 > a^3 >a

 Option E: a^2 > a^4 > a > a^3
Output (English): Option D