The valkyries were beautiful female warriors. (16) they had some of woden’s own strength and were armed with helmet and shield and spear. like woden, they rode unseen through the air and their horses were almost as swift as sleipnir himself. they swiftly carried woden’s favorite warriors to valhalla, the hall of the slain. (17) the walls of valhalla were hung with shields; its ceiling glittered due to polished spearheads. from its five hundred and forty gates, each wide enough for eight hundred men abreast to march through, the warriors rushed every morning to fight a battle that lasted till nightfall and began again at the break of each day. (18) when the heroes returned to valhalla, serving them with goblets of mead such as woden drank himself.
which choice best explains the meaning of the proofreading symbol in red?
a) delete
b) insert
c) repeat
d) transpose