In order to keep track of the state of each running process, the operating system creates a _____________ for each. process control block linked list CPU thread  Which PCB fields below can have their values changed when a process is in "Running" state. parent, children, open_files   process_state, children   process_state, open_files   children, open_files . Considering the implementation of a process create() function, select the correct choice for each of the following when the function is executed to create a process p. p.process_state = p.parent = p.children = p.cpu_state = READY, BLOCKED, NULL, RUNNING

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