Which two statements are true regarding a PL/SQL package body? (Choose two.)

A package body cannot exist without a corresponding package specification because the spec defines the public interface that the body is required to implement. Oracle enforces this dependency at creation time.

This is false - a package body can freely call subprograms defined in other packages, which is one of the primary purposes of the package construct in PL/SQL.

This is false - a package body can also contain private subprograms that are not declared in the specification, making them accessible only within the body itself.

The package body can be modified and recompiled without invalidating the package specification, because the spec is a separate, independently compiled object. Dependent objects only become invalid when the specification itself changes.