“do you know mr. robert ferrars? " asked elinor.

"not at all—i never saw him; but i fancy he is very unlike his brother—silly and a great coxcomb."

"a great coxcomb! " repeated miss steele, whose ear had caught those words by a sudden pause in marianne’s music.— "oh, they are talking of their favourite beaux, i dare say.”

"i can answer for it that miss dashwood’s is not,’ said mrs. jennings, laughing heartily; ‘for he is one of the modestest, prettiest behaved young men i ever saw; but as for lucy, she is such a sly little creature, there is no finding out who she likes.” (sense and sensibility, chapter 24, pp. 18–19)

based on this excerpt, what does the term coxcomb most likely mean?

a man who is absurdly handsome
a man who is deeply admired by society
a foolish and irresponsible man devoted to nothing
a vain and conceited man devoted to style and neatness