Your existing application running in Google Kubernetes Engine (GKE) consists of multiple pods running on four GKE n1"standard"2 nodes. You need to deploy additional pods requiring n2"highmem"16 nodes without any downtime. What should you do? 

Answer options:

A. Use gcloud container clusters upgrade. Deploy the new services.
B. Create a new Node Pool and specify machine type n2"highmem"16. Deploy the new pods.
C. Create a new cluster with n2"highmem"16 nodes. Redeploy the pods and delete the old cluster.
D. Create a new cluster with both n1"standard"2 and n2"highmem"16 nodes. Redeploy the pods and delete the old cluster.

B