Results from both animal and human research indicated similar effects of high testosterone levels. Based on these findings, hens given testosterone should tend to

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Both animal and human research showed that high levels of testosterone increase aggression, dominance, and mating behaviors. Roosters are known to crow frequently and exhibit dominant behaviors, so it is likely that hens given testosterone would act more like roosters, including crowing more and gaining social status. The other options (A, C, D) are not supported by the research and are unlikely outcomes of testosterone in hens.

Results from Both Animal and Human Research Indicated Similar Effects