State What Action the Urinalysis Supervisor Could Take in the Following

Multiple Choice

State what action the urinalysis supervisor could take in the following situations:
-A new employee consistently obtains negative Watson-Schwartz test results on suspected cases of lead poisoning.

A) Check the Ehrlich reagent
B) Confirm addition of acetylacetone
C) Confirm the specimen has been centrifuged
D) Check the employee for color-blindness