What is determined when an NSX Administrator creates a …

What is determined when an NSX Administrator creates a Segment ID Pool ?

A.
The range of VXLAN Network Identifiers (VNIs) that can be assigned to Logical Switches.

B.
The total number of Logical Switches that can be deployed in a single Compute Cluster.

C.
The range of VLAN segments that can be assigned to Transport Zones.

D.
The total number of addresses that can be used to assign VTEP IP addresses to ESXi hosts during host preparation.

Explanation:
https://pubs.vmware.com/NSX-6/index.jsp?topic=%2Fcom.vmware.nsx.install.doc%2FGUID-7B33DE72-78A7-448C-A61C-9B41D1EB12AD.html
Assign Segment ID Pool and Multicast Address Range to NSX Manager
You must specify a segment ID pool for each NSX Manager to isolate your network traffic. If an NSX controller is not deployed in your environment, you must add a
multicast address range to spread traffic across your network and avoid overloading a single multicast address.
The Segment ID Pool specifies a range of VXLAN Network Identifiers (VNIs) for use when building Logical Network segments.
Procedure
1
On the Installation tab, click Logical Network Preparation and then click Segment ID.
2
Click the Edit (edit) icon
3
Type a range for segment IDs. For example, 5000-5200.
The segment ID range determines the maximum number of logical switches that can be created in your infrastructure.
4
If you do not have a deployed NSX controller in your environment, select Enable multicast addressing and type an address range. For example, 239.1.1.10-
239.1.1.20.
Note
You must specify a multicast address range for VMware ESX 5.1 hosts or when using the hybrid mode.
5
Click OK.