A Dental Student Wants to Test If Fluoride Is an Effective

question 59

Multiple Choice

A dental student wants to test if fluoride is an effective additive against tooth decay.The student studies tooth decay in a population of people who live in neighborhoods supplied with fluoridated water.This student would like to ask whether access to fluoridated water prevents tooth decay.What would be an effective control group to ask this question?

• A)Individuals who have fluoride added to their toothpaste but not their water.
• B)Individuals with access to fluoridated water.
• C)Individuals with access to water with no fluoride added.
• D)Individuals with access to differing amounts of fluoride in the water.

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Definitions:

Plague

A contagious bacterial disease characterized by fever and delirium, often with the formation of buboes, and sometimes infection of the lungs.

Middle Ages

A historical period in Europe spanning approximately from the 5th to the late 15th century, marked by feudalism, the rise of Christian monasticism, and the lack of central government.

Devastating Toll

A severe negative impact or consequence, often referring to loss of life, extensive damage, or significant hardship.

Cause

A factor or situation that brings about an effect or a change, or the reason something happens.