The correct answer is C. Causal analysis.
Causal analysis is a type of statistical analysis that is used to determine the cause and effect relationship between two or more variables. It is a powerful tool that can be used to understand the relationships between variables and to make predictions about future events.
Inferential analysis is a type of statistical analysis that is used to make inferences about a population based on a sample. It is used to estimate the parameters of a population, such as the mean or the standard deviation.
Exploratory analysis is a type of statistical analysis that is used to explore the data and to identify patterns and relationships. It is used to generate hypotheses about the data and to develop models.
None of the other options are correct because they do not help to find the effect of variable change.