Which statement is true about the JDBC core classes?.
C.
Option A is incorrect because Driver is an interface while DriverManager is a concrete class.
The inverse isn't true either; DriverManager doesn't implement Driver.
Option B is incorrect because the Connection implementation comes from the database driver jar.
Option C is correct.
You can turn off auto-commit mode, but it defaults to on.
Option D is incorrect because you need to call rs.
next()
or an equivalent method to point to the first row.