What average performance change is guaranteed to happen, assuming all cluster nodes are fully operational?

Refer to the exhibit.

An organization uses a 2-node Mute runtime cluster to host one stateless API implementation. The API is accessed over HTTPS through a load balancer that uses round-robin for load distribution. Two additional nodes have been added to the cluster and the load balancer has been configured to recognize the new nodes with no other change to the load balancer.

What average performance change is guaranteed to happen, assuming all cluster nodes are fully operational?
A . 50% reduction in the response time of the API
B . 100% increase in the throughput of the API
C . 50% reduction In the JVM heap memory consumed by each node
D . 50% reduction In the number of requests being received by each node

Answer: D