Slight disclaimer. I did read the following post, Meaning of に in ～にできる , but did not see it's reasoning directly translating to my sentence.
Here is sentence in question:
So the speaker is saying that since these girls are quintuplets, if one of them can do something, then the rest of them should be able to do it too. I've seen that にする can mean "to decide on something" or "to make" and できる is the potential form of する, but I can't see how that would work here. What is it that the girls can do/make? How does に as a the location particle work here?
Any help would be much appreciated. I feel that there is something that has gone unsaid here and I can't put my finger on it.
EDIT. Or is all what comes in front of こと just a descriptive clause and what she can do/make is the abstract こと?