Refer to the exhibit. An engineer must modify the existing QoS policy-map statement to implement LLQ for voice traffic. Which change must the engineer make in the configuration?

The term `LLQ` itself is a feature, not a command used to replace `bandwidth` in a policy-map for configuration; `priority` is the correct command for strict priority queuing.

The `priority` command within a Cisco policy-map is specifically used to configure Low Latency Queuing (LLQ), which provides strict priority queuing for time-sensitive traffic like voice. When `priority <bandwidth>` is applied to a class, it ensures that traffic belonging to that class is serviced before any other queues, up to the specified bandwidth, thereby minimizing delay and jitter for critical voice traffic.

The `reserve` command is not a standard QoS command used in policy-maps to implement LLQ; `priority` is the correct command for strict priority queuing.

The `percent` keyword is typically used with the `bandwidth` command (e.g., `bandwidth percent 170`) to allocate a percentage of available bandwidth, which is not what LLQ achieves, as LLQ provides strict priority, not just a guaranteed percentage.