Which code represents drug screen, presumptive, single drug class from Drug Class List B, by immunoassay (eg., ELISA)?

A water molecule at the surface contains enough kinetic activity to enter the vapor state. This is the definition of which of the following?

a. Evaporation c. The boiling point b. Vaporization d. The critical point

A medicare instituted method of hospital payment and classification of patients of illness by diagnosis