Answer:
c. A spiritual medium.
Explanation:
Sarah Winchester was the wife of William Winchester, a famous and rich son of the owner of the Winchester Repeating Arms company. The company made lots of rifles and gained prominence and eventually became rich. The "Winchester Mystery House" is the name of the sprawling house that Sarah built under the advice of a spiritual medium.
After the death of both her child and husband, Sarah went to see a medium in Boston who told her to move to California. She also was told to construct a place to house the spirits of those killed by the guns made by the Winchester Repeating Arms company. This will be her way of atoning for the lives taken by her family's company/trade.
