Why would this address 192.168.100.0 would be a good starting ip address

in CCNA & CCENT
Why would 192.168.100.0 would be a good starting address in this case and comment on any other relevant points, considering, for example, public/private, static.dymamic and ipv4/ipv6
These were the requirements
Group A has 14pcs
Group B has 22pcs
Management has 3 pcs and a printer
Group C has 70 pcs
4 other subnets 3 for wans 1 for a server
I have already subnet the network to meet the requirements
However now I need to explain why 192.168.100.0 would be a good starting address. The only things I can think of is that this is a private class c address and due to the host requirement we don't need a lot of hosts so the class c addres fits the requirements and also due to the host requirements ipv4 is only required as well
Can you guys give me suggestions of what else I can put
Network Suffix or Mask
Group C
192.168.100.0/25
192.168.100.1
192.168.100.126
192.168.100.127
255.255.255.128
Group B
192.168.100.128/27
192.168.100.129
192.168.100.158
192.168.100.159
255.255.255.224
Group A
192.168.100.160/28
192.168.100.161
192.168.100.174
192.168.100.175
255.255.255.240
Management
192.168.100.176/29
192.168.100.177
192.168.100.182
192.168.100.183
255.255.255.248
Server
192.168.100.184/30
192.168.100.185
192.168.100.186
192.168.100.187
255.255.255.252
Coaltown to Utility Co 1
192.168.100.188/30
192.168.100.189
192.168.100.190
192.168.100.191
255.255.255.252
Coaltown to Clothtown
192.168.100.192/30
192.168.100.193
192.168.100.194
192.168.100.195
255.255.255.252
Clothtown to Utility Co 2
192.168.100.196/30
192.168.100.197
192.168.100.198
192.168.100.199
255.255.255.252
These were the requirements
Group A has 14pcs
Group B has 22pcs
Management has 3 pcs and a printer
Group C has 70 pcs
4 other subnets 3 for wans 1 for a server
I have already subnet the network to meet the requirements
However now I need to explain why 192.168.100.0 would be a good starting address. The only things I can think of is that this is a private class c address and due to the host requirement we don't need a lot of hosts so the class c addres fits the requirements and also due to the host requirements ipv4 is only required as well
Can you guys give me suggestions of what else I can put
Network Suffix or Mask
Group C
192.168.100.0/25
192.168.100.1
192.168.100.126
192.168.100.127
255.255.255.128
Group B
192.168.100.128/27
192.168.100.129
192.168.100.158
192.168.100.159
255.255.255.224
Group A
192.168.100.160/28
192.168.100.161
192.168.100.174
192.168.100.175
255.255.255.240
Management
192.168.100.176/29
192.168.100.177
192.168.100.182
192.168.100.183
255.255.255.248
Server
192.168.100.184/30
192.168.100.185
192.168.100.186
192.168.100.187
255.255.255.252
Coaltown to Utility Co 1
192.168.100.188/30
192.168.100.189
192.168.100.190
192.168.100.191
255.255.255.252
Coaltown to Clothtown
192.168.100.192/30
192.168.100.193
192.168.100.194
192.168.100.195
255.255.255.252
Clothtown to Utility Co 2
192.168.100.196/30
192.168.100.197
192.168.100.198
192.168.100.199
255.255.255.252