Tamper-resistant prescription pads with six security devices to prevent copying exemplify a(n) ...

Tamper-resistant prescription pads with six security devices to prevent copying exemplify a(n) ________ to affect the relationships among the agent, environment, and members of a population to reduce the rate of occurrence of a disorder.
 
  A. affective measure that minimizes the chances of onset of legaldrug
  abuse by applying technologic methodologies
  B. technologic measure that modifies a noxious agent
  C. service measure that modifies the environment in which a
  substance is used
  D. technologic measure that modifies the environment in which a
  substance is used