A question abut travelling.?

No. 1 is better as Alaska is a kind of far from Europe, although is near Canada. Bulgaria is a fun country as well as rest of Europe, so I will also choose 1 if I were you. But be warn that 1 week is not enough for explore the whole of Europe, so you should give out more time for Europe and less for Bulgaria, eg. Europe 3 weeks and Bulgaria another 3 weeks or so. So whatever your choose, good luck and have fun than.