81.Given: 1. interface DoStuff2{ 2. float getRange(int low, int high)；}  3. 4. interface DoMore { 5. float getAvg(int a, int b, int c)；} 6. 7. abstract class DoAbstract implements DoStuff2, DoMore{} 8. 9. class DoStuff implements DoStuff2{ 10. public float getRange(int x, int y){return 3.14f；}} 11. 12. interface DoAll extends DoMore{ 13. float getAvg(int a, int b, int c, int d)；} What is the result?
(A) The file will compile without error.
(B) Compilation fails. Only line 7 contains an error.
(C) Compilation fails. Only line 12 contains an error.
(D) Compilation fails. Only line 13 contains an error.
(E) Compilation fails. Only lines 7 and 12 contain errors.F. Compilation fails. Only lines 7 and 13 contain errors.G. Compilation fails. Lines 7, 12, and 13 contain errors.