The AI assistant agrees with the suggested answer of A and D.
The question asks for two solutions that meet both IP addressing and routing requirements. Let's analyze each option:

A: Modifying the subnet mask to 255.255.254.0 for IT and operations departments. This is a valid option. The current subnet mask of 255.255.255.0 provides 254 usable IP addresses per subnet. Changing it to 255.255.254.0 doubles the number of available IP addresses to 510 per subnet. This would solve the IP addressing issue for the IT and operations departments, allowing each employee to connect up to three hosts.
D: Configuring static routing to allow access from 10.1.30.1 to each subnet. This is also a valid option. 10.1.30.1 is the gateway for the IT department. By configuring static routes on each subnet to route traffic destined for other subnets through 10.1.30.1, IT will be able to communicate with all subnets. This addresses the routing requirement.

Now, let's examine why the other options are incorrect:

B: Configuring static routing to allow access from each subnet to 10.1.40.1. 10.1.40.1 is the gateway for the BYOD subnet. Allowing all subnets to route traffic to the BYOD subnet does not meet the requirement for the IT department to communicate with all other subnets, nor does it fix the IP addressing issue.
C: Modifying the BYOD policy to reduce the volume of devices that are allowed to connect to the corporate network. This might alleviate IP address exhaustion on the BYOD subnet, but it doesn't solve the IT and operations departments' IP addressing problems, nor does it address the routing issue for the IT department.
E: Combining the subnets and increasing the allocation of IP addresses available to support three hosts for each employee. Combining subnets would eliminate subnet segregation, which is a stated requirement.
F: Modifying the subnet mask to 255.255.255.128 for the IT and operations departments. This would *reduce* the number of available IP addresses (to 126) per subnet, making the IP addressing situation worse, not better.

Therefore, options A and D are the only options that meet both the IP addressing and routing requirements.

Citations

Subnetting, https://www.omnisecu.com/tcpip/basic-classes-of-ipv4-addressing.php
Static Routing, https://www.cloudflare.com/learning/network-layer/what-is-static-routing/