What is the correct sequential order of the steps in the scientific method of problem solving? A. Collecting data B. Defining and delimiting the problem C. Formulating a hypothesis D. Analyzing and interpreting the results Choose the correct answer from the options given below:

Arrange the basic steps of conducting a Randomized Controlled Trial (RCT) for the treatment and prevention of disease in the proper sequence: A. Randomization B. Manipulation or Intervention C. Drawing up a protocol D. Selecting Reference and Population for trial E. Follow-up and assessment of outcome

Which primary qualitative data collection technique involves researchers immersing themselves directly in the natural environment of the participants to study behaviors?