Answer:
2.) histamine
1.) actually i don't know what number 1 is, all i know is number 2
I would go with all of the above
When you know the health care provider, you are aware of whom to bill, as well as any additional information that may come in handy for billing and coding. For example, this knowledge allows you to refer to a specific provider's resources, to understand what their policies cover, and to classify disorders accordingly. This applies to more than just common reproductive disorders.
It is a good idea because it helps to detect if there is too much carbon monoxide in the house. If there is too much, it can be poisonous and the detector will let you know. this answer would be TO AVOID POISONING BY A BUILDUP OF CO GAS.
btw, is this platoweb? just curious.