Final answer:
The field drug test kit used for suspected meth is option B) Marquis reagent. The Marquis reagent is commonly used to test for methamphetamines and amphetamines.
Step-by-step explanation:
The field drug test kit used for suspected meth is option B) Marquis reagent.
The Marquis reagent is commonly used to test for methamphetamines and amphetamines.
It is a color reaction test that can detect the presence of these drugs by producing a specific color change.
In the case of the Marquis reagent, a positive result for meth will produce a yellow, orange, brown, or green color.