Answer:
C). Mysterious.
Explanation:
The tone is characterized as the attitude or perspective that an author adopts to express his/her content. In the given trailer, the author has adopted a mysterious tone in order to show the poor condition of Cindrella living under her 'stepmother.' A feeling of the puzzle is displayed through the frequent questions which leave the readers' riddled and wondering that whether Cinderella would be able to escape from the tyranny or not. Thus, option C is the correct answer.