The sight of a syringe has been noted to produce in a heroin ...

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The sight of a syringe has been noted to produce in a heroin addict a sudden desire for a fix and he begins twitching. Such reactions were not present until the syringe was seen. We can say that the syringe has become
 
  a. a conditioned stimulus
  b. an unconditioned stimulus
  c. a conditioned response
  d. an unconditioned response

Question 2

What are the distinctions between drug abuse and drug dependence?
 
  What will be an ideal response?

[popopong]

Answer to Question 1

a

Answer to Question 2

Drug abuse is evidenced when there is recurrent drug use by the individual that is often accompanied by adverse consequences, e.g., social, economic, health, for the individual or society. Drug dependence includes this feature; in addition, in the absence of the drug, the drug dependent person experiences unpleasant and uncontrollable mood states that is accompanied with the compulsive use of drugs. Typically tolerance is evidenced and physiological withdrawal may be evidenced if the drug is not taken.

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TYSM

[cam1229]

Great answer, keep it coming