Which of the following shows correct parallel structure?

a)successful students study often, work hard, and turning in assignments on time.

b)successful students study often, work hard, and turn in assignments on time.

c)successful students study often, working hard to turn in assignments on time.

d)successful students study often, to work hard and also turning in assignments on time.

The answer is B: Successful students study often, work hard, and turn in the assignments on time.

 Parallel structure is a grammatical construction that makes each idea or item in a sentence to follow the same grammatical pattern, creating fluency, which helps the readers easily follow the writing work. In the sentence B, we can see the pattern used (only verbs) to say what successful students do: study; work; turn in.

A) doesn't have parallel structure: study; work; turning in

C) doesn't have parallel structure: study; working; to turn in

D) doesn't have parallel structure: study; to work; turning in

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.