​Which firm is not dealing with adverse selection

A) ​a manufacturer requires a 90 day probationary period for new employees
B) a temporary clerical agency requires a typing test
C) a manufacturer requires suppliers to be ISO 9000 certified
D) ​Smokers get the same life insurance rates as non-smokers

Smokers getting the same life insurance rates as non-smokers indicates that the firm is not dealing with adverse selection, as it is not adjusting the rates based on the higher risk associated with smoking. The other options are all examples of firms attempting to mitigate adverse selection in some way.