When a prosecutor makes a they agree to make a deal if the defendant pleads guilty to specific charges, in return for specific concessions from the prosecutor.

a. bargaining plan
b. special concession
c. plea bargain
d. special arrangement

Plea bargain

Explanation:

A plea bargain is an agreement between the defender and the prosecutor. In this agreement, the defendant makes a guilty plea in the exchange related to the agreement by the prosecutor, so that the prosecutor can drop the charges.  

There is a crowd in the court. So it is very difficult for the prosecutor and the judges pressure increased.  

The criminal trial takes many days, months and years. The outcomes may be given a trial for guilt for minutes.

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.

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