Which two statements are true regarding a PL/SQL package body？（）<br>A:It cannot be created without a package specification.<br>B:It cannot invoke subprograms defined in other packages.<br>C:It can contain only the subprograms defined in the package specification.<br>D:It can be changed and recompiled without making the package specification invalid.

Which two statements are true regarding a PL/SQL package body？（）
A:It cannot be created without a package specification.
B:It cannot invoke subprograms defined in other packages.
C:It can contain only the subprograms defined in the package specification.
D:It can be changed and recompiled without making the package specification invalid.

出自：Oracle认证

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