C probably if not then sorry
Answer:
a longitudinal design
Explanation:
Longitudinal study: This is an observational method of research, that gathers data from the same participants frequently or repeatedly over a while. This research can take plenty of time, and it can extend over months, years or decades. Also known as a panel study or longitudinal survey.
Types of longitudinal studies:
1. Panel Study.
2. Cohort Study.
in the three months to February 2017 there were 33.4 million people in the UK labour force and 1.56 million people classed as unemployed. These figures gave an official UK unemployment rate of 4.7%.