Incident commanders within the unified command do all of the following, except:
a. concur on the selection of the general staff section chiefs.
b. work together to establish resource ordering procedures.
c. communicate to make joint decisions and speak as one voice.
d. form multiple command structures if disagreements arise.

Incident commanders within the Unified Command concur on the selection of the General Staff Section Chiefs. They work together to establish resource ordering procedures, and communicate to make joint decisions and speak as one voice. They do not form multiple command structures if disagreements arise.

The answer would be letter D.