In the representation of global diversity of invertebrates, what do the portions A, B, C, and D represent?

- AA-Insects, B-Crustaceans, C-Other animal groups, D-Molluscs
- BA-Crustaceans, B-Insects, C-Molluscs, D-Other animal groups
- CA-Molluscs, B-Other animal groups, C-Crustaceans, D-Insects
- DA-Insects, B-Molluscs, C-Crustaceans, D-Other animal groups