Which topic would be most appropriate for a four- to five-page research paper?

are boys and girls different?
do children learn better in boys-only and girls-only schools?
how many boys-only schools are in the us?
are male teachers or female teachers more effective?

(4) what has fields argued in his case before the supreme court?

In this excerpt from "dover beach" by matthew arnold, which two lines or sets of lines suggest that the speaker has undergone a loss of faith? the sea of faith was once, too, at the full, and round earth's shore lay like the folds of a bright girdle furled. but now i only hear its melancholy, long, withdrawing roar, retreating, to the breath of the night-wind, down the vast edges drear and naked shingles of the world. ah, love, let us be true to one another! for the world, which seems to lie before us like a land of dreams, so various, so beautiful, so new, hath really neither joy, nor love, nor light, nor certitude, nor peace, nor for pain; and we are here as on a darkling plain swept with confused alarms of struggle and flight, where ignorant armies clash by night.

Which of the following statements is a claim of definition?