15 For the following program: #include int main(void) int x; printf("Enter a value for x > "); scanf("%d",&x); if (x > 6) if (x 7) printf("A"); else printf("C"); } else if (x > 12) printf(""); else printf("B"); } ) else printf("F"); return 0; What is the output if the value of x typed by the user is 7? . . B. B D.D EF