Civil law provisions are the main focus of police work. (True or false?)

Civil law provisions are the main focus of police work.
 
  Indicate whether the statement is true or false

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(Question #2) The major problem with mail surveys is cost.
 
  Indicate whether the statement is true or false

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(Question #3) A nonrandom sample in which a researcher tries to find as many relevant cases as possible, until time, financial resources, or his or her energy is exhausted, or until there is no new information or diversity from the cases is called
 
  _________________. Fill in the blank(s) with correct word

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(Question #4) The supervision styles of probation officers include: punitive officer, protective officer, treatment officer, and passive officer.
 
  Indicate whether the statement is true or false