This is, unfortunately, a typical OutSystems exam question, meaning it hinges on the exact definition of certain terms, instead of actually testing the student's knowledge (as well as containing a semantic error, C should read "does not support resolving data conflicts")...

In this case, "supporting data conflicts" means that if there is a data conflict (i.e. there's two different sets of data about to be written), there's a way to determine which set of data will be chosen as the "right" one, i.e. will be persisted to the database. In the case of "write last", there's a way to determine that, because each and every change will be written to the database. And since there's a way, it does support resolving data conflicts. So C is wrong.