A scientist being interested in adding to our general knowledge about oxygen would probably call his approach ______.

A．newsrooms are suffering from a decline in standards
B．there a. re too many ethical scandals going on in newspapers
C．there is a perception that newspapers should do more to correct mistakes
D．this has been a rough time for newspapers and many are wondering what is wrong

A．but this creates pressures on newsrooms to control it
B．and this has meant that newsrooms can improve its quality
C．but there needs to be more reflection on the integrity of the process
D．and this has created division among the various departments in a newspaper