[A] Formulate the research question, Select an appropriate sample, Establish a quantification system, Define the question.
[B] Establish a quantification system, Define the question, Select an appropriate sample, Formulate the research question.
[C] Define the question, Establish a quantification system, Formulate the research question, Select an appropriate sample.
[D] Formulate the research question, Define the question, Select an appropriate sample, Establish a quantification system.