You can use points on the alternative answers to consider partial scoring.
Here there are different answers that you may want to consider, e.g.
We can do this by alternative answers:
Then we should check in preview mode:
You need to use the additional option to interpret as a set.
Note that right now the set needs to match exactly, so a student entry of 2,4 will get zero. In the future we will try to add a partial scoring for sets and lists.