An SELinux security context is required to ensure that all files in /opt have the default context of system_u:object_r:usr_t. How should the corresponding configuration entry be formatted?

This option has the order of the context and path reversed.

In SELinux file context configuration files (like those used by `semanage fcontext`), the correct format specifies a regular expression for the file path, followed by the desired security context. The `/opt/.*` regular expression correctly matches `/opt` itself and all files and subdirectories within it, while `system_u:object_r:usr_t` is the full specified context.

While `/opt/*` could match immediate children, `/opt/.*` is more robust for matching the directory itself and all its contents recursively in SELinux contexts, and the order is reversed.

This option has the order reversed and includes an extra colon after the context.

This option has the order of the context and path reversed.