13. The graph shows results from a study that sought to determine average exposure to triclosan in the U.S. population. Which statement is supported by the results in the graph?
Answer: C
Triclosan concentration in urine is highest in the 30- to 39-year-old age group.
The results from the study indicate that the highest levels of triclosan concentration in urine are found in the 30- to 39-year-old age group, as depicted in the graph. This finding highlights a specific trend in exposure among this demographic.
A) Triclosan concentration does not vary significantly among different age groups.
This option is incorrect because the graph clearly illustrates varying levels of triclosan concentration across different age groups. The data indicates distinct differences, particularly showing that the 30- to 39-year-old group has higher concentrations compared to others.
B) Increased levels of triclosan in urine are related to increased age.
This statement is misleading. While the graph shows higher triclosan levels in the 30- to 39-year-old age group, it does not support a direct correlation of increased levels with increased age across all demographics. Other age groups do not show a consistent trend that supports this claim.
C) Triclosan concentration in urine is highest in the 30- to 39-year-old age group.
This statement is accurate according to the graph. The data specifically shows that individuals in the 30- to 39-year age range have the highest urinary concentrations of triclosan, confirming this trend.
D) People aged 20-29 likely use more products containing triclosan.
This option is not supported by the graph. The data does not indicate that the 20- to 29-year-old age group has higher triclosan concentrations, nor does it provide evidence that they use more products containing triclosan compared to the 30- to 39-year-old group.
Conclusion
The correct answer, C, is supported by the data presented in the graph, which clearly shows that the 30- to 39-year-old age group has the highest triclosan concentrations. All other options either misinterpret the data or fail to accurately reflect the findings, making them incorrect in the context of the study's results.