I think it’s C. But not sure
The answer is D. We can conclude that the answer is not A because seconds after, the deer becomes scared after noticing the cameraman and leaves. The answer could not have been C, as it has nothing to do with the wind. B also is not likely the answer because the fact that the deer continued to eat moss on the ground shouldn't have anything to do with the wind ruining the cameraman's shot.....;)
The All Saints Day celebration was also called All-hallows or All-hallowmas (from Middle English Alholowmesse meaning All Saints' Day) and the night before it, the traditional night of Samhain in the Celtic religion, began to be called All-Hallows Eve and, eventually, Halloween.