Select the sentence fragments that complete this sentence so that it is true.

When one process forks another:


the process that calls fork is called the parent and the newly-created process is the child.
the code segments of the two processes are identical.
the values of all the variables of the two processes are identical.
the two processes have all the same variables but each process has its own copy and the return value from the fork system call is different for the two processes because in each case it is set to the other's PID.
the operating system determines which of the two process gets to execute first.
the two process are siblings.