Population census can be an example of

Correct option is C

Population census is an example of a longitudinal study. Longitudinal studies are research designs that involve repeated observations of the same variables over long periods of time. A census, such as the population census, collects data at regular intervals (usually every 10 years) to track changes in population size, distribution, and characteristics over time, making it a classic example of longitudinal research. It does not focus on a specific case (case study) or past events (historical study), nor does it manipulate variables like an experiment.
Information Booster:
1. Longitudinal studies provide data over a period to analyze trends and changes.
2. The population census is conducted every 10 years in many countries.
3. Census data helps governments in planning resources and policy-making.
4. Case studies focus on in-depth analysis of individual cases or groups.
5. Historical studies investigate past events to understand their causes and consequences.
6. Experimental studies involve manipulating one variable to observe effects on another.