Oftentimes, when a grammar review has multiple correct answers, the order of the answers can be somewhat jumbled up as you rotate through the “Alts”.
It would be clearer if these possible answers were in some kind of logical order. Alphabetically might be a good start, although this may not always be the best way for every example.
In some cases it may make more sense to order the answers “from most casual to most polite” or “from most common to least” or “from most verbose to most terse” (or reversed) - to give a non-exhaustive list of examples.
One good point about the multiple answer feature is that the one that matches the audio is the one that is shown by default upon correct answer. That said, it would be nice if the black dot jumped to the correct spot in that case. It does sometimes, but not always - possibly depending on whether it was a correct or incorrect answer. I often find myself having to loop through the answers a second time so I can see what the first dot really is.
When I say dots, I mean these: 