The answer is "D"
The ice age lasted for a long... Long time.
Where the line was is correct. Once the line is there you get a perfect square. Since a square has 4 equal sides, and each side is exactly 6 ft. Now, do 6x6x6x6= 1,296
Hope this helps :)
Answer:
77 boxes
1,000 / 13 = 76.9230769
They can't sell part of a box and a little extra money never hurt any one.