What Has Research on Pretrial Publicity Demonstrated About Bias

What has research on pretrial publicity demonstrated about bias?

A) It tends to produce bias in favour of the defendant and people will be well aware of this bias.
B) It tends to produce bias in favour of the defendant,though people will not realize they are biased.
C) It tends to produce bias against the defendant,and people will be well aware of this bias.
D) It tends to produce bias against the defendant,though people will not realize they are biased.