Answer:
C). To foreshadow tragedy.
Step-by-step explanation:
The authors employ several tactics or strategies to keep the inquisitiveness and interest of the readers intact and therefore, they keep adding elements that aids to create suspense and fascination among the readers. Inclusion of the details and description of the family's tragic past is one of these tactics that not only 'foreshadows or hints the readers about forthcoming tragedy' but also helps to evoke the desired response(emotions of pity and fear(catharsis)) from them. Thus, option C is the correct answer.