The answer from the explanation is not included in the choices. Q: 13 | KRQBR
Hey @James1, thanks for posting!
We should have a sticky note on this topic; I copy and paste the same response often
On the actual GRE exam, every question will have at least one correct choice. Some of our older questions don’t follow this convention yet and might have all incorrect (which is the case on this one). In this case, you should just leave them all selected and confirm your (empty) choice.
We’re working on updating these as well as adding many more new questions.
Thanks for highlighting this one!