Please help me w this question asap!

the price of our current war is high; it costs money and it costs lives.

but it does not cost our pride. it does not cost the guilt that would arise from knowing that we did nothing to intervene while our neighboring nations fell to despotic leaders.

it does not cost the terror of knowing that our allies are unstable. it does not cost the fear that we, too, will be next to fall.

which sentence most accurately explains why the speaker's use of the parallel structure is effective in this passage?

a. it underscores that disagreement will not be tolerated and will be dealt with swiftly.

b. it makes the speaker seem like a decisive and capable leader.

c. it emphasizes reasons to fight and inspires listeners to aid the war effort.

d. it establishes the speaker's credibility by acknowledging the difficulties of war.

being untruthful

eating too much

overstaying one's welcom

this is that correct answer.

b. our party quickly made its way into the cave / but we failed to find our host [the cyclops] himself inside.

i'm thinking it would be when compound subjects are joined by or, nor,either-or, neither-nor.