I think you're looking for this

The annotations seem to be the same comments from the previous draft. Is this an error?

@kanigowskimason41 Thank you!!

They also ratcheted up the difficulty by having A say "during the period three billion to five billion years ago" instead of "during the late heavy bombardment." Basically adding in another logical move for you to make: recognizing that the LHB occurred 4 billion years ago.