Why was "Which color is the skirt" marked wrong? I thought that Cen generally meant "which."
From the Foclóir Gaeilge-Béarla entry for cé:
- Interr. pron. (With article and noun, in reference to persons or things; combines with form an of article to form cén) What. Cén fear é? What man is he? Cé na himreoirí atá acu? What players have they? Cén lá den tseachtain é? What day of the week is it? Cén aois é? What age is he? Cén uair? At what time? When? Cén áit? At what place? Where? Cén fáth? For what reason? Why? Cén chaoi? Cén dóigh? In what way? How? Cén amaidí í! What nonsense! Cén bhéicíl atá ort? Why are you shouting?