Original breadth of a rectangular box is 20 cm. The box was then remade in such a way that its length got increased by 30% but the breadth decreased by 20%. This led to an increase in area by 100sq.cm. What is the new area of the box?

• A. 3600 sq.cm.
• B. 3200 sq.cm.
• C. 2600 sq.cm.
• D. 2500 sq.cm.