What key performance indicators (KPIs) are commonly monitored in Cloud RAN?

The choice highlighting latency, throughput, and reliability as key performance indicators (KPIs) in Cloud RAN is indeed the most relevant. Each of these metrics plays a crucial role in assessing the performance of a Cloud RAN system.

Latency refers to the delay before a transfer of data begins following an instruction for its transfer. In Cloud RAN, minimizing latency is vital to enhance user experience, especially for applications that require real-time data transmission, such as video conferencing and online gaming.

Throughput measures the amount of data transmitted successfully over a communication channel in a given time frame. In a Cloud RAN environment, optimizing throughput is essential to ensure that the network can handle high traffic volumes effectively, thereby supporting more users and services without degrading performance.

Reliability indicates the system's ability to perform consistently under specified conditions without failure. Ensuring high reliability is fundamental in Cloud RAN, as it impacts service continuity and user trust.

While the other options present various important metrics, they do not focus as specifically on the core performance aspects key to the operation and assessment of Cloud RAN systems. Consequently, latency, throughput, and reliability stand out as the most critical KPIs for monitoring in this context.