It's both. If you find an answer you have provided was rejected just because of that, please submit a REPORT. There are thousands of entries in the database, and it is possible that some alternative answers have been missed here and there. Also, moderators don't decide anything so submit a REPORT; reports go to the incubator where course contributors can process them. ;)
In the same learning module the word ' train' was given correctly once as τραίνο (Write the Greek for 'the train' )and above as τρένο. (The train is there). I used το τραίνο in both sentences and was given one correct mark and one incorrect. Are both right? If so, why mark me incorrect for one and correct for the other?