If the length and breadth of a room are increased by 1 m each, its area is increased by 21 m2. If the length is increased by 1 m and breadth decreased by 1 m, the area is decreased by 5m2. Find the area of the room.

• A.  96 \[{{m}^{2}}\]  
• B.  108 \[{{m}^{2}}\]         
• C.  90 \[{{m}^{2}}\]                   
• D.  60 \[{{m}^{2}}\]