The correct answer is B) Rowlandson was able to be returned to her husband.
The effect of John Hoar's arrival was that Rowlandson was able to be returned to her husband.
In colonial Massachusetts, John Hoar (1622-1704) was an Indian liaison between the Native American Indian tribes and the white Europeans, during King Philip's War. This was was an armed confrontation between the native Indians that inhabited those territories against the colonist of New England and its Indian Allies. The war started in 1675 and ended in 1678.
In those years, Hoar is credited with the rescue of Mary Rowlandson that was captured at Redemption Rock, wife of the village Minister Jhon Rwlandsond. There is a book called "A True History of the Captivity and Restoration of Mrs. Mary Rowlandson," that recorded the incident.