Answer: Option B experiments
Explanation:
- Causality is also known as causation or cause and effect. It is defined as the relationship that exists between cause and effect.
- Among types of research the experiments produce an outcome and have a cause and effect and thus can establish causality.
- As compared to experiments , the biased studies as the name suggests are biased in nature and thus cannot establish a causality.
- Similarly, random and representative surveys are slightly biased in nature and not correct.
Since the experiments have a cause and effect, they can establish causality.
