Consider this draft passage. The editing team for the library makerspace policy update had two versions of the reservation guide. The members discussed which wording was accurate. Even though the schedule had changed twice, the assistants monitored the revision, yet the new rule confused the instructors more than it confused [they working on the library makerspace policy update]. Patrons made fewer duplicate reservations. In the library makerspace policy update draft, which choice makes the pronoun usage in the bracketed phrase grammatically correct?