Here the perimeter of a rectangle with the area of 10 versus the perimeter of a rectangle with the area of 12. Well, look at your extremes. The rectangle with an area of 10 could have sides of 1 and 10 which would give it a perimeter of 22, or it could have sides of 2 and 5, which would give it a perimeter of 14. The perimeter of the rectangle with a perimeter of 12 could have sides of 1 and 12 or 3 and 4. So, obviously, here the answer is D, not enough information.