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Both vent lines would be alright, if the combined stack went through the roof and was otherwise designed not to siphon out the water seal of the sink P-trap.
It may be alright with just AAV's, too. There are projects that use only AAV's, and no vents through the roof, but my conservative nature suggests that a combination should be used, since AAV's are subject to failure. They are easy to fix, though.
christopher
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