Suppose a politician accepts a contribution from an interest group and proceeds to make a policy decision that is unduly favorable to that group. if someone can establish a cause-and-effect link between the contribution and the policy decision, then what crime has been committed?

bribery.

Explanation:

Interest group is any group which are formed around a common interest and influence government policies to favor its interest. They do not hold political offices but continuously tried to influence them. The act of offering or receiving anything to attain a favor from someone is called bribery, which is the crime committed in the question.

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.

for your question the answer would have to be france