You have a virtual machine that is currently configured with 2 vCPUs and 4 GB of memory. It is running out of memory. You want to upgrade the virtual machine to have 8 GB of memory. What should you do? 

Answer options:

A. Rely on live migration to move the workload to a machine with more memory.
B. Use gcloud to add metadata to the VM. Set the key to required-memory-size and the value to 8 GB.C. Stop the VM, change the machine type to n1-standard-8, and start the VM.
D. Stop the VM, increase the memory to 8 GB, and start the VM.

D