The correct answer is C. Marauder : Pillage.
A lawyer is someone who practices law, which is the study and application of the law. Litigation is the process of resolving a legal dispute through a court of law. A marauder is someone who attacks and robs people, especially in a wild or uncivilized area. Pillage is the act of stealing goods from a place that has been attacked or conquered.
In each of the other options, the two words do not have the same relationship. A lexicographer is someone who writes or compiles a dictionary. A copy is a reproduction of an original work. A director is someone who is in charge of a company, organization, or production. A board is a group of people who are responsible for the management of a company or organization. A harbinger is a person or thing that comes before and announces the arrival of something else. A mask is a covering for the face.