Answer:
Create a PSO in ADAC, configure the password policy, and apply it to the Research Department group.
Explanation:
Based on the information provided within the question it can be said that the best procedure to follow in this situation would be the following. First create a PSO in the Active Directory Administrative Center (ADAC). Secondly, configure the password policy as needed. Lastly, apply that policy to the Research Department Group so that it only affects them.