A longitudinal study:
ASurveys a group at one point in time
BStudies only animals
CTracks the same subjects across multiple time points
DUses no statistics
Answer & Solution
Correct answer: C. Tracks the same subjects across multiple time points
1. A cross-sectional study takes one snapshot in time.
2. A longitudinal study tracks the same subjects over time.
3. Hence option B.
_Source: Trueman's UGC NET/SLET General Paper I (Manohar Pub.), 2010 — Research Designs_