What Is the Ethical Question Most Pertinent to the Use

What is the ethical question most pertinent to the use of jury consultants?

A) Does the use of jury consultants make an acquittal more likely?
B) Does the use of jury consultants make a guilty verdict more likely?
C) Do jury consultants make it more likely for a wealthy defendant to win the case?
D) Do jury consultants promote scientifically unproven techniques?