Final answer:
Mary Shelley's intention to write a ghost story manifested in her novel Frankenstein, likely a Gothic tale meant to frighten readers and make them more aware of their surroundings, fitting best with option D.
Step-by-step explanation:
Mary Shelley, known for her novel Frankenstein, was a part of the Gothic tradition, which incorporated elements of the supernatural and the macabre in its storytelling. Shelley's desire to write a ghost story was realised through her creation of Frankenstein, a tale that features reanimation of the dead and questions of morality in the use of science. Although the question does not specify which exact type of ghost story Shelley aspired to write, based on the introduction and the nature of Gothic novels, one could infer that she may have wanted to write a story that incorporated supernatural and dream-like events, potentially aligning with Option D: A story that frightened readers so much they would become suspicious of their surroundings. None of the options provided align with the typical characteristics of Shelley's writing, as they tend to be more focused on the internal strife and moral quandaries that the supernatural elements symbolize, rather than the external reactions such as those mentioned in options A, B, and C.