Excerpt from norse mythology part c
kate mcconnaughey

(17) the walls of valhalla were hung with shields; its ceiling glittered due to polished spearheads.

read the passage. look at the underlined sections marked number (17). there may be a mistake in the way the sentence is written. if you find a mistake, choose the answer that corrects the mistake. if there is no mistake, choose ‘correct as is.’
a) correct as is.
b) the walls of valhalla were hung with shields; its ceiling glittered with polished spearheads.
c) the walls of valhalla were hung with shields; its ceiling was glittering with polished spearheads.
d) the walls of valhalla were hung with shields; its ceiling glittered because of polished spearheads.