According to the passage, which of the following describes a difference between fermions and bosons? A. Fermions cannot inhabit the same fundamental state, whereas bosons bunch together in the same state. B. Fermions contain many more types of particles than bosons. C. Fermions exist in groups, but bosons do not. D. Fermions have integral spin values, whereas Bosons have half-integer spin. E. Fermions do not obey the Pauli principle, whereas bosons do.