Final answer:
Under the Family Systems Model, a common first-order intervention for a later-life family dealing with new challenges they do not understand would be to provide education about the challenges.
Step-by-step explanation:
Under the Family Systems Model, a common first-order intervention for a later-life family dealing with new challenges they do not understand would be to provide education about the challenges (option D). By providing education, the family can gain a better understanding of the challenges they are facing and learn how to effectively navigate them. This intervention can help the family develop new skills and strategies to overcome the challenges they are encountering.