Correct Answer: C. Experimental
Detail About MCQs
Experimental studies involve manipulating variables to observe the effect on another variable, allowing researchers to establish cause-and-effect relationships. In contrast, clinical studies (option A) may focus on examining individuals with specific conditions, and developmental studies (option D) may explore changes over time, but experimental studies specifically aim to determine causation. Comparative studies (option B) may involve comparing different groups, but they might not always establish direct cause-and-effect relationships.