Experimental participants do not know which condition they have been assigned

A. Correlation ExperimentB. Double-blind StudyC. Random AssignmentD. Single-blind Study

The correct answer is letter A

Correlational is the type of research that seeks to explore relationships that may exist between variables except the cause-effect relationship. The study of relationships between variables is descriptive because there is no manipulation of variables, and prediction is the most frequently established type of relationship.