Which one of the following soil horizons is least likely to ...

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Which one of the following soil horizons is least likely to interact directly with living organisms?
 
  A) A horizon
  B) O horizon
  C) E horizon
  D) C horizon

Question 2

Entering a new job at a small medical testing facility, Ben is cautioned to handle certain chemicals carefully. Wondering what harm some of these chemicals can potentially cause, Ben asks a coworker.
 
  The coworker says, Well, I think they can cause cancer if you breathe the fumes. Ben wants to be certain. According to OSHA guidelines, Ben should A) read the relevant material safety data sheets.
  B) search the Internet for medical articles related to these compounds.
  C) ask the supervisors about the dangers of the substances he handles.
  D) check the information on the HAZMAT signs in his workplace.

[bfulkerson77]

Answer to Question 1

D

Answer to Question 2

A