Answer:
a longitudinal study
Explanation:
Hello! A longitudinal study is a type of research design that involves studying and evaluating the same group of people for an extended period of time. It is an extended case study and constitutes a purely qualitative task. By taking a long time, your program can cost a lot of money.
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...historians may never be able to determine fact from fiction when studying the past
The state of Arkansas appears to be the first state to use state funds to help its counties improve their local roads.