how many Administrators can connect in Read/Write mode to the MDS database simultaneously?

When deploying a VSX Gateway managed by a Provider-1 MDS, how many Administrators can connect in Read/Write mode to the MDS database simultaneously?

A.
One for each CMA

B.
Two: One can connect to the Management Virtual System database, while the other connects to the Virtual System database

C.
One

D.
No more than 25

E.
No more than 250