The correct answer would be option A. Leafy gametophytes. The feature that differentiates mosses from liverworts and hornworts are the leafy gametophytes. A gametophyte is a multicellular haploid generation which is involved in the process of alternation of genes along with a diploid generation called as sporophyte.
<em>Oh i think if you search for your friend then I think it will come... I THINK!! I am not sure... Sorry if I am wrong... I am trying to answer all the question properly.</em><em> </em><em>Have </em><em>a </em><em>nice </em><em>day:</em><em>)</em>