2 and 3 fail, but 2 only fails a tiny bit by not clarifying. It is gibberish. The best approximation is "haden" as 2 gave, but the 'n' would have to be somehow pronounced after a vocalic stop. So you'd have to read it something like
"hade [air stops going through your throat] [resume air flow] n"
because, technically speaking, that is all the ッ does in Japanese, is to indicate a vocalic stop. However, this is difficult to explain to students, so instead they are taught that it "doubles the next consonant," completely ignoring occurences like ああっ