This problem tests your understanding of Unix process control. Please draw a fork diagram (tree parent and child)and explain every step.

int main() { int status; int counter = 1; if (fork() == 0) { counter++; printf("%d", counter); } else { if (fork() == 0) { printf("5"); counter--; printf("%d", counter); exit(0); } else { if (wait(&status) > 0) { printf("6"); } } } printf("3"); exit(0); } 

Select each of the following strings that is a possible output of the program. Could be multiple outputs.

A) 253063

B) 251633

C) 520633

D) 506323

E) 263503