My sister, Lucy, still hasn't decided the country where...

[cyprus]

Source: gmatclub's GMAT Ultimate Grammar book

My sister, Lucy, still hasn’t decided the country where she wants to travel after she graduates from university.
a) still hasn’t decided the country where she wants to travel
b) which country she wants to visit still doesn’t know it
c) is undecided about the country where she wants to travel
d) hasn’t decided which country where she is traveling
e) still hasn’t decided what country she wants to visit

I didn't find anything wrong with (a) and picked it. however answer is (e). My questions are:
1. is the change of word from 'travel' to 'visit' warranted here?
2. In option (a), I thought that 'where...travel' is a noun modifier modifying 'the country'. Is this incorrect? Basically, what is wrong with option (a)?

Thanks very much for any replies. much appreciated

[tim]

You don't "decide the country..."; ideally you "decide which country...". Frankly, I don't like the use of "decide what country..." in E, but at least it's better than "decide the country...". In other words, I would eliminate an answer choice with "decide the country..." but not a choice with "decide which country..." or "decide what country...".

[RonPurewal]

this question is not testing anything that's actually relevant to the gmat.
ignore.