A Longitudinal Study Is Characterized by Each of the Following

Multiple Choice

A longitudinal study is characterized by each of the following statements EXCEPT:

A) It involves a panel, which is a fixed sample of elements.
B) Elements may be stores, individuals or other entities.
C) The panel remains relatively constant through time.
D) Characteristics of the elements, or sample members, are measured only once.
E) Members may be added to replace dropouts or to keep the panel representative.