initd is the right answer

Answer: D (initiab) - When you boot the system or change run levels with the init or shutdown command, the init (init.d) daemon starts processes by reading information from the /etc/inittab file. This file defines three important items for the init process: * The system's default run level * What processes to start, monitor, and restart if they terminate * What actions to take when the system enters a new run level

INITD should be the answer