Subgingival calculus derives their mineral from which of the following that is found in the sulcus and periodontal pocket

Which one of the following statements shows that the AEMT has a proper understanding of basic operations at the scene of a hazardous materials emergency?

A) "Life or health should never be risked if the threat is only to the environment." B) "If you cannot see or smell a chemical, the chance of one being present is very low." C) "It is critical to remove the patients as quickly as possible from the incident site." D) "Identification of the material is not important, since the approach is the same for all materials."

These are the ones needed at Grand Rounds Hospital.?

A) ?demonstrative B) ?interrogative C) ?indefinite D) ?reflexive