If the following list was sorted using a merge sort, which of the following could NOT be a sub-list created by the merge sort?
['A', 'P', 'R', 'I', 'L', 'S', 'F', 'O', 'O', 'L', 'S']

1. Correct Answer
   Incorrect Answer
   a

   AL

2. Correct Answer
   Incorrect Answer
   b

   APRILS

3. Correct Answer
   Incorrect Answer
   c

   FOOLS

4. Correct Answer
   Incorrect Answer
   d

   AP

5. Correct Answer
   Incorrect Answer
   e

   LS