【单选题】
A Connection conn=DriverManager.getConnection( "jdbc:mysql://localhost:3306/SCHOOL","root","manager");
B Connection conn=DriverManager.getConnection( "jdbc:mysql://localhost:3306/SCHOOL");
C Connection conn=DriverManager.getConnection( "jdbc:mysql://localhost:1433/SCHOOL");
D Connection conn=DriverManager.getConnection( "jdbc:mysql://localhost:1433/SCHOOL","root", "manager");
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