An organization has an on-premises IT infrastructure. Their customer-facing application repeatedly fails during peak usage. What could be causing this issue?

An organization has an on-premises IT infrastructure. Their customer-facing application repeatedly fails during peak usage.
What could be causing this issue?

A. A serverless compute function struggles to scale. B. The application contains unclean data. C. They don't have enough servers to meet the demand. D. The application is only configurable on-premises.