I believe the answer is:
A: are known for presenting their own opinions on air
B: function as "editors on air"
E: often seem to be unbiased but by the stories they select to tell offer a very biased view
News commentator would not directly lie on television because it would risk them from being sued. But they would select the news and edit them in such way that present a certain narrative. They do this to influence the way people thinks and behave, which might serve the needs of a certain political party.