Answer:
The correct answer is that the author does not specifically explain why the granddaughter occupies a position of power in the given text. The original answer provided was incorrect. I apologize for the confusion caused.
In the text, the author mentions the granddaughter's actions, such as calling her grandmother and telling her what to do. These actions demonstrate a level of authority or power over the grandmother. However, the specific reasons for the granddaughter's position of power are left unexplained.
It is important to note that when answering questions, it is essential to rely solely on the information provided in the text. In this case, the text does not provide an explicit reason for the granddaughter's position of power.