When a part of a thrombus breaks off, it is referred to as 

On the scene of a minor motor vehicle collision, you are attending to a female patient complaining of head and neck pain. A crowd has gathered to watch the action. Which one of the following will the observing public most likely remember about the incident?

A) Number of emergency vehicles B) Color of the ambulances C) Position of the emergency vehicles D) Wrinkled uniforms worn by the EMTs

Class ________ are represented by multivariable indicators that react to two or more parameters. An example is internal chemical indicators printed on a paper strip

A. 4 B. 2