When searching in a dictionary, you must always keep in mind the alphabetical order of words. In this case, the correct answer is C. because "loathsome" would be located after "lively" (a word starting with "li" goes before one that starts with "lo") and before "lobster" (a word starting with "lob" goes after one that starts with "loa"). The other answers aren't in the appropiate alphabetical order ("load" goes before "lobworm"), are too far apart (there are too many words between "loose and "leopard") or both ("linear", "landslide").