[单选题]You work as a database administrator for Certkille

AIt degrades the run time and compiler performance.

BIt provides better run time and compiler performance.

CIt provides better optimization of the statement during parse time.

DIt forces the rule based optimizer to be used for statement optimization.

EIt provides better run time performance but slightly degraded compiler performance. 

FIt provides better run time performance but slightly degraded run time performance.