Answer:
I believe it is the last one: "That the subjects ... may have arms for their defence"
I would say that the stirrup allowed for quicker mounting of the horse, and it may have caused horses to be used in battle more frequently.
<span>Iconoclastic Controversy, a dispute over the use of religious images in the Byzantine Empire in the 8th and 9th centuries. The Iconoclasts objected to icon worship for several reasons, including the Old Testament prohibition against images in the Ten Commandments and the possibility of idolatry. The defenders of icon worship insisted on the symbolic nature of images and on the dignity of created matter.<span> </span></span>
Could you give more detail on the question is please?
The answer is b, hope this helps