An administrator is deploying a new virtual desktop environment onto an existing Nutanix solution.

Based on the given information, the administrator is deploying 1000 instant clone virtual desktops, 500 full clone virtual desktops, and 150 applications. To support these workloads, the Nutanix solution will need multiple storage containers.

According to the Nutanix Certified Professional - End User Computing (NCP-EUC) v6 guide, for VDI workloads, it is recommended to create a separate storage container for each type of desktop (e.g. instant clone, full clone) and another container for AppStacks. It is also recommended to have at least one container for metadata and one container for replicas.

Therefore, for this scenario, a total of 3 storage containers should be created:

One container for 1000 instant clone virtual desktops

One container for 500 full clone virtual desktops

One container for 150 applications delivered via AppStacks

So the answer is C. 3.