For large and dense clusters, what can cause etcd to have poor performance?

For large and dense clusters, what can cause etcd to have poor performance?
A . The keyspace grows excessively large and exceeds the space quota allocated for the etcd database
B . The maxPod per node value is not set during installation
C . The master node is resized in a running OpenShift cluster
D . The pool of IP addresses is exhausted

View Answer

Answer: A

Explanation:

https://docs.openshift.com/container-platform/4.3/scalability_and_performance/recommended-host-practices.html