High fever is a common cause of sinus arrest

In the basic methodology of fire investigations, how can a fire test help the investigator?

a. Make a better guess as to the events b. Makes it easier to say a fire cause was undetermined c. Confirm or reject a hypothesis d. None of the above

ICD-10-PCS was initially published in:

A) 1990. B) 2005. C) 2001. D) 1998.