GMAT Sentence Correction (SC) | Re: In surprising medical news, scientists investigating

In surprising medical news, scientists investigating long-term effects of stroke are reporting that injury to a specific part of the brain, located behind the ear, can instantly and permanently break a smoking habit.
brain, located behind the ear, can instantly and permanently break a smoking habit
brain located behind the ear can instantly and permanently break a smoking habit
brain, located behind the ear, can instantly and permanently break the habit of smoking
brain located
...

---