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A PL/SQL procedure queries only those columns of a redefined table that were unchanged by the online table redefinition.  What happens to the PL/SQL procedure after the online table redefinition？（）
A: It remains valid.
B: It becomes invalid for all options of online table redefinition but automatically gets revalidated the next time it is used.
C: It becomes invalid for all options of online table redefinition and is automatically recompiled during online redefinition of the table.
D: It becomes invalid only if the storage parameters have been modified and it automatically gets  revalidated the next time it is used.

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出自：Oracle认证

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