Find the total surface area of a cone, it its slant height is 9 m and the radius of its base is 12 m.

• A.  562 \[{{m}^{2}}\]                  
• B.  792 \[{{m}^{2}}\]  
• C.  692 \[{{m}^{2}}\]                  
• D.  600 \[{{m}^{2}}\]