Final answer:
The most inclusive group with centrally positioned foramina magna in the base of the cranium is 'hominids,' which includes humans, great apes, and their ancestors.
Step-by-step explanation:
The most inclusive (most general) group, all of whose members have foramina magna centrally positioned in the base of the cranium, is D) hominids. Hominids include all modern and extinct great apes, which comprise humans, gorillas, chimpanzees, and orangutans, along with their ancestors. This categorization is based on the anatomical and evolutionary characteristics that these species share, including certain aspects of their cranial features. The positioning of the foramen magnum (the large hole in the base of the skull) is a crucial feature in the study of human evolution as it relates to bipedal locomotion, which is a characteristic of hominins, a subgroup within the hominids, that includes modern humans and our direct ancestors.