The best answer would be a. interpersonal.
The case study highlights the supportive relationship Laurie has with her grandmother, especially when her grandmother offers to help her with her academic stress. This reflects an interpersonal dynamic characterized by communication, support, and emotional connection.
While there may be elements of intrapersonal aspects to consider (Laurie's own internal feelings and struggles), the question primarily focuses on the relationship between Laurie and her grandmother, which is interpersonal in nature.
Thus, the other options (b. intrapersonal, c. work, and d. A, B and C) do not directly pertain to the relationship aspect emphasized in the case.