Abigail is troubleshooting a performance issue on her servers. She has identified a disk bottleneck that is slowing down the servers but not yet causing failures. What is the best immediate option for Abigail to take in response to this disk bottleneck?

a$.$

Run fewer applications on the servers

b$.$

Add more memory to the servers

c$.$

Continue operations while monitoring the bottleneck

d$.$

Defer making changes until she can fully understand the bottleneck