Exploratory studies tend to use general research questions to understand more about the issues that ...

Exploratory studies tend to use general research questions to
  understand more about the issues that we are studying. They tend to
  not emphasize why questions, but instead focus on the descriptors of
  who or how.
 
   Which of the questions below could be used in an
  exploratory study?
  A. How many college students are retained each semester?
  B. What is the relationship between college retention and income
  C. College retention is related to income.
  D. College retention is positively related to income.

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In the pilot test of a data collection instrument, most research
  participants checked other and wrote in widely varying answers to a
  fixed-alternative item. What should the researcher do?
 
  A. Create a composite index to measure the variable.
  B. Create a scale to measure the variable.
  C. Create an open-ended item to measure the variable.
  D. Delete the item. Do not attempt to measure the variable.

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Historically, the antagonism between researchers and practitioners that
  has existed within social work could be attributed to:
 
  A. researchers, but not to practitioners.
  B. both researchers and practitioners.
  C. practitioners, but not to researchers.
  D. social work students.