Task: Question Answering
Input (English): Question: I'm building a wall out of square blocks (1 ft x 1 ft) and want the wall to be perfectly square. Currently the unfinished wall has a width of 50 feet and an area of 2000 square feet. How many more blocks do I need to add to make the wall a perfect square with the present width?

 Option A: 200

 Option B: 10

 Option C: 50

 Option D: 500

 Option E: 150
Output (English): Option D