Correct option is B
The correct answer is (b): A-IV, B-I, C-II, D-III
The correct match between the types of research/study and their descriptions is:
A. Basic Research is fundamentally about expanding knowledge and understanding, often without immediate practical application. It's closely associated with theory development or enhancement. So, it matches with IV. A study/research that tests or expands on theory.
B. Correlational Research investigates the relationship between two or more variables to determine whether they covary in a systematic way. Hence, it aligns with I. Investigations meant to discover whether variables covary.
C. Case Study involves an in-depth examination of a single subject or a small group, offering detailed insight into aspects of their lives or conditions. This method is described by II. An in-depth study of a single or a few individuals to see how changes affect the person’s behavior.
D. Longitudinal Study entails observing and measuring a group of participants over a period to track changes or developments, which matches III. A group of participants is observed and measured over time.