This is the Main Point question.
The author points out benefits of using court adjudication to resolve family dispute, but ultimately shows preference to family mediation.
Now, let's go to the answer choices, and look for something similar to the statement above.
A) The study is only mentioned in the last paragraph. Too narrowly focused.
B) The final sentiment on this passage is favorable towards family mediation.
C) What happens when given option, or participants preference, is not the focus of this passage.
D) This both covers valid points from adjudication while ultimately favoring family mediation. This is Correct.
E) The author does not point out that adjudication “failed” to do things that mediation does as a main point.