Answer:
A or C
Explanation:
C because it is to moltiple readers
A because it could be to the one person
The answer is "stacks." That is the object of the phrase, and since a person is searching for something ON the shelf, they aren't searching for the shelf itself.
It was powerful in war and in magic,and its priests and medicine men were feared in all the surrounding country.
I think it is 7 because it explains it