Which of the following is denoted by "10-16"?

The code "10-16" stands for "Stand By." In the context of law enforcement communication, particularly within the Nevada Highway Patrol and other police agencies, the ten-codes (or radio codes) are standardized codes used to convey information quickly and clearly over radio transmissions.

When an officer or dispatcher uses "10-16," it communicates to other units that there is a request for assistance or presence without implying an immediate emergency or urgent situation. This might be necessary in various scenarios, such as when an officer needs backup while on a routine stop or is waiting for instruction in a non-urgent situation.

The other options represent different situations that would not align with the meaning of "10-16." For instance, an "Investigation" could involve collecting evidence or witness statements, a "Domestic Dispute" typically requires rapid intervention due to potentially volatile circumstances, and a "Fight in Progress" indicates an active altercation requiring immediate police response. Each of these scenarios necessitates a different handling than simply standing by.