Which of the following is NOT a core component of the WHO's global STI control strategy?
ACase management
BUniversal mandatory screening
CStrategic information systems
DPrevention services
Which of the following is a type of observational study that analyzes population-level data?
AEcological study
BCase-control study
CRandomized controlled trial
DLongitudinal study
Which type of measurement scale is used to rank data without precise intervals, such as satisfaction levels?
ANominal
BOrdinal
CInterval
DRatio
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