Question:Choose the correct statement: 

A All PL/pgSQL expressions in a function, except dynamic queries, are only prepared once during the lifetime of the PostgreSQL backend process 

B All PL/pgSQL expressions in a function are only prepared once during the lifetime of the PostgreSQL backend process 

C All PL/pgSQL expressions in a function are prepared for each execution time during the lifetime of the PostgreSQL backend process 

D None of these above is correct 

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