Which Avamar Gen4 nodes can be used in multi-node configurations?

Which Avamar Gen4 nodes can be used in multi-node configurations?

A.
1.3 TB, 3.9 TB

B.
2.6 TB, 3.9 TB

C.
2.6 TB, 7.8 TB

D.
3.9 TB, 7.8 TB