28. Which of the following method best describes a research method that studies a person in-depth for some
time through the use of interviews, writings, and observations?
(A)correlational
(B) experimental
(C) case study
(D)survey
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統計: A(2), B(0), C(5), D(1), E(0) #2789649
統計: A(2), B(0), C(5), D(1), E(0) #2789649