Task: Question Answering
Input (English): Question: If a is a positive integer, then 2^a + 2^(a + 1)+ 2^(a + 2)+ 2^(a + 3)+ 2^(a + 4) =

 Option A: 3^(a + 1

 Option B: 2^(a + 1

 Option C: 2a

 Option D: 2a^(a + 1

 Option E: 31(2^a
Output (English): Option E