When a Concerned Citizen Asks the CHN About Environmental Health

When a concerned citizen asks the CHN about environmental health, what definition of environmental health does the CHN provide?

A) Environmental health is the causative factors invading a susceptible host through an environment favourable to producing disease, such as a biological or chemical agent.
B) Environmental health is the systematic and ongoing observation and collection of data concerning disease occurrence to describe phenomena and detect changes in frequency or distribution.
C) Environmental health is the study of the effect of physical, chemical, and biological factors in the external environment on human health.
D) Environmental health is the achievement of health and wellness and the prevention of illness and injury from exposure to physical or psychosocial environmental hazards.

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