ANSWER:
- B. Design
- C. Case study
- B. Historical study
- A. Ethnography
- C. Case study
- B. Probability
- B. Interview
- B. Simple Random
- A. Stratified Sampling
- C. Quota Sampling
- D. Expert sampling
- B. Open-Ended Survey
- C. Observation
- A. Interview
- D. Focus group
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