Researchers Have Found a General Relationship Between Testicular Cancer and Exercise

question 12

Multiple Choice

Researchers have found a general relationship between testicular cancer and exercise. Increased exercise is associated with a decrease in incidence of testicular cancer. However, a positive relationship (increased incidence of testicular cancer) was found between testicular cancer and riding bikes or horses. Several factors might be hypothesized to bring about this result. All but one of the following statements are reasonable hypotheses that researchers might follow to seek the cause for this relationship. Choose the exception.

• A)Riding bikes or horses causes trauma to the testes.
• B)The seat on bikes and the saddle on horses are made of material containing chemicals that damage testicular cells.
• C)Riding bikes or horses increases scrotal temperature, which damages testicular cells.
• D)Mutations that lead to testicular cancer make men more likely to ride bikes or horses.

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