I believe the answer is: The court
Which means that the court would treat the words that come from the lawyers as the extension of the words that intended by the defendants.
Because of this, it is important for the lawyers to have a strong Communication skills so they can influence the judge and the juries to understand their client's position.
I'm pretty sure it is B, but if I'm wrong it would be D.
I believe the answer is Daoist
To extend their power and to discover and conquer new lands before Europe