Final answer:
The correct directory to place a script for it to automatically start with the operating system is /etc/init.d. This directory holds initialization scripts and is part of the boot process in Unix-like operating systems.
Step-by-step explanation:
If you want a script to automatically start when the operating system starts, the script should be placed in the /etc/init.d directory. This directory is used for initialization scripts and daemon configuration used to start or stop system services. It is part of the initialization system in Unix-like operating systems. For example, placing a script here and configuring it correctly would allow it to run during the boot process, ensuring that your desired service starts with the system.
It's important to note that depending on the system and its configuration, some additional steps may be required, such as updating the system's run levels or enabling the service using the appropriate system commands.