Which Web Security feature allows employees to utilize web applications while also having the ability to bock or monitor problematic applications?

Realtime Application Sandboxing is a threat analysis technique for executing suspicious files in an isolated environment, not an application usage control mechanism.

Application Phishing refers to protections against credential harvesting via fake application login pages, not visibility and control of application usage.

Application Visibility and Control (AVC) is a dedicated feature in Cisco Web Security that identifies thousands of web and cloud applications traversing the network in real time. It provides granular policy controls that allow administrators to permit productive applications while blocking or throttling non-compliant or risky ones. This combines traffic classification with policy enforcement to balance employee productivity and corporate security.

Layered Scanning and Control describes a content inspection approach for malware detection in web traffic, not application-level identification and access policy enforcement.