The characteristic of the poem that suggests it is a lyric poem is in the option B. the emotional response the daffodils evoke in the speaker.
Because a lyric poem will be market by a musical rhythm and the expression of personal emotions and feelings of the writer. In "I Wandered Lonely as a Cloud" Willian writes about feelings of loneliness, gazing, pensive mood and pleasure that are all related to his own emotions and feelings.