Task: Question Answering
Input (English): Question: Let U = {1, 2, 3, 4, 5, 6, 7, 8, 9}, A = {1, 2, 3, 4}.Find A'

 Option A: {2,5}

 Option B: {3,4}

 Option C: {5,6}

 Option D: {7,8}

 Option E: {5,6,7,8,9}
Output (English): Option E