Correct Answer:
A. Experimental research
Explanation: Random sampling is a technique in which every member of the population has an equal chance of being selected. It helps reduce sampling bias and improves the representativeness of the sample, making research findings more reliable and generalizable.
Why Experimental Research?
- Experimental research aims to establish cause-and-effect relationships.
- Random sampling helps obtain a representative sample from the population.
- Random assignment of participants to experimental and control groups minimizes bias and increases the validity of the results.
Note: Although random sampling can be used in many types of research, it is considered especially important in experimental research. In contrast, action research usually involves a specific classroom or local setting and commonly uses purposive or convenience sampling rather than random sampling.