An organization uses breadth-first load balancing. During a non-typical weather-related event, an unexpectedly high number of users logged onto WVD to work remotely. During this time, users complained of slowness and applications crashing. What would you do to prevent performance issues for a higher than expected number of users?

Answer options:

A.Set the Host Pool max session limit and change the load balancing algorithm to depth-first.
B.Set the Host Pool Max Session limit.
C.Implement an auto-scale solution to scale up the session hosts at the time of high activity.
D.Double the number of session hosts to accommodate a greater number of users.

Correct Answer: B 
During the configuration of breadth-first load balancing, you might set a maximum session limit per session host in the host pool.Host Pool Max Session Limit can be set to a number that will best suit your environment. It will avoid performance issues by preventing the new connections beyond the defined capacity.
Run the below PowerShell cmdlet for configuring a host pool for breadth-first load balancing and to set a new maximum session limit: 

Option A is incorrect. You don’t need to change to depth-first to set a max session limit. It can even be set in breadth-first load balancing.
Option B is correct. Host Pool Max Session Limit can be set to a number that will best suit your environment.
Option C is incorrect. Auto Scaling up is not a recommended solution as the session host would require to be removed and replaced to add larger Virtual Machine sizes.
Option D is incorrect. Doubling the number of session hosts isn`t a recommended solution as we don`t know if that would provide adequate capacity.
Reference: 
To know more about load balancing options, please visit the below-given link: 

https://docs.microsoft.com/en-us/azure/virtual-desktop/configure-host-pool-load-balancing#configure-breadth-first-load-balancing