why not futur antérieur?

why not futur antérieur?

From a quiz on usage of "quand" and future tense:Question was:Quand ils ________, tu iras les accueillir. When they arrive, you will go and welcome them.and the correct answer given was "arriveront".However, I wonder if the futur antérieur would be more appropriate/acceptable? They have to arrive before you can go meet them, right? So, how about:"Quand ils seront arrivés, tu iras les accueillir."Can anyone provide guidance on this?Merci!
Asked 3 months ago

NOT A REAL REPLY. 

I'm replying to this question myself to see if that will keep it in the system because the first time I submitted it the system deleted it. 

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