The sioc acts as the fbi's worldwide emergency operations center. which of these is established by the fbi in response to significant threats or incidents involving federal crimes under the criminal jurisdiction of the united states?

The answer is Joint Operations Center (JOC)

The FBI established JOC (Joint Operations Center) to manage their resources and to coordinate an investigative response to federal crimes, response to threats, and critical incidents in support of overall event security. This Joint Operations Center is a military executive body for managing the  crisis management process and is a manned facility of a joint force commander's headquarters was established for monitoring, planning, and guiding execution of the commander's decisions. 

Ithink it's c selection but i don't really know.