Each digit 1, 2, 3, 4, 5, 6, 7, 8 and 9 is represented by a different letter A, B, C, D, E, F, 6. H and I but not necessarily in that order. Further each of A + B + C, C + D - E, E + F + G and G + H + I is equal to 13. What is the sum of C, E and G?

• A. 7        
• B. 9
• C. 11                                  
• D. Cannot be determined