<em>Option C: Thomas Hardy, "The Convergence of the Twain"</em>
Explanation:
Alliteration is a figure of speech and stylistic device that occurs when some words close to each other begin with the same letter, but also can be the same sound of the letters (C and K : Conspire; King). In the poem, the alliteration happens with the letter S: solitude; sea; with the letter P: pride; planned; and again with the letter S: silly; she.
I'd say the third passage because it's the only one in which alliteration (repeating initial consonant sounds to produce rhythm) is at all detectable ("solitude of the sea", "pride ... that planned", "stilly couches she").
