Which of the following resources should be adjusted to plan for future growth?

The sales department is preparing to launch a high-demand product for purchase through the company’s online store. The senior engineer asks the junior engineer to review the sales cloud resources to plan for a surge in online traffic:

Given the metrics in the table above, which of the following resources should be adjusted to plan for future growth?
A. Propose additional memory for cluster 1.
B. Propose additional storage for cluster 1.
C. Propose additional guests for cluster 2.
D. Propose additional hosts for cluster 2.