A characteristic of the scientific method that sets it apart from other ways of acquiring knowledge ...

A characteristic of the scientific method that sets it apart from other
  ways of acquiring knowledge is:
 
  A. it is best used for validating a phenomenon that cannot be
  directly observed
  B. that it strives for subjectivity
  C. provides provisional knowledge
  D. promotes creativity and imagination in developing procedures

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A medical social worker wants her staff to evaluate their practice for
  an upcoming audit. She is not sure what research design might work
  best.
 
  She decides to do a pilot with one social worker and asks him to
  assess his practice with one of his clients. What type of design will be
  social work be implementing?
  A. Pre/test design
  B. Post/test design
  C. Single systems design
  D. Experimental design

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What does a measure of dispersion tell the reader of a research
  report?
 
  A. what was a typical measurement of a variable
  B. whether the relationship between two variables was statistically
  significant
  C. the degree to which measurements of a variable tended to differ
  from each other
  D. whether a relationship between variables is a useful one