Question: Automatic query optimisation means that the: a . optimisation takes place at compilation time by the programmer. b . database access strategy is defined when

Automatic query optimisation means that the:
a.
optimisation takes place at compilation time by the programmer.
b.
database access strategy is defined when the program is executed.
c.
optimisation process is scheduled and selected by the end user or programmer.
d.
DBMS finds the most cost-effective access path without user intervention.

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