More Dogs Are Being Diagnosed with Thyroid Problems Than Have

question 40

Multiple Choice

More dogs are being diagnosed with thyroid problems than have been diagnosed in the past. A
Researcher identified 50 puppies without thyroid problems and kept records of their diets for
Several years to see if any developed thyroid problems. This is a(n)

• A) survey
• B) retrospective study
• C) prospective study
• D) blocked experiment
• E) randomized experiment

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