Final answer:
The early hominins characterized by a wide parabolic dental arcade, reduced canine teeth, and large molars relative to anterior dentition are the Australopithecines.
Step-by-step explanation:
The dental features that characterize the early hominins, such as a wide parabolic dental arcade, reduced canine teeth, and large molars relative to anterior dentition, are specific to the Australopithecines (option B) group. Australopithecines had smaller jaws and teeth, a third molar larger than other molars, a skull shaped more like Homo erectus or Homo habilis, and bipedal and humanlike feet. These features are distinct from the dental characteristics of other hominin groups listed in the options.