In order to form a common operating picture of the incident and secure additional resources the incident commander relays requirements to:
a. regional response coordination center
b. unified coordination group
c. local emergency operations center
d. state/tribal emergency operations

C. Local emergency operations center

Explanation:

According to my research on the Incident Command Structure, I can say that based on the information provided within the question the Incident commander relays requirements to the Local emergency operations center. This is a central control facility that is responsible for carrying out the principles of emergency preparedness and management at a strategic level during an emergency.

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