In this kind of question, always the solution is to show that one example is truly representative of the entire cases

Conclusion

Spiritualism, the doctrine that it is possible to communicate with the spirits of the deceased through especially talented persons called mediums, is fraudulent

(B) The conclusion depends on a historical report, and such reports of past events do not recount all of the circumstances.

We do have examples or case study NOT reports. The stem clearly talks about doctrine.

(E) The correctness of the report depends on the veracity of antispiritualists, who may be expected to be biased.

What the ANTI - something says is not the gist of the problem.

We care about if the phenomenon is a fraud or less.