Which sentence is a simple sentence?

a.
i enjoy fishing, but i get seasick in boats.

b.
before the trip, i had never been to a national park.

c.
my dog has spots; hers does not.

d.
before the train came to a halt, its brakes squealed loudly.

Go, wondrous creature! mount where science guides, go, measure earth, weigh air, and state the tides; instruct the planets in what orbs to run, correct old time, and regulate the sun; which statement is correct? antithesis is used in the first two lines. antithesis is used in the last two lines. parallelism is used in the first two lines. parallelism is used in the last two lines.

Which best expresses the irony present in this passage?

Which of the following statement about conflict in the workplace is true?