Which choice most logically completes the text?

|Question 14Verbal

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Exclusively inhabiting tropical countries such as Tanzania, wild chimpanzees lack adaptations to seasonal variations in ultraviolet B (UVB) irradiance from sunlight, since UVB exposure enables vertebrates to synthesize vitamin D. This raises questions about how chimpanzees in mid-latitude zoos are affected by the lower and more variable UVB irradiance in those locations. In a study of zoo chimpanzees in France and other mid-latitude countries, Sophie Moittie and colleagues found not only that chimpanzees' vitamin D levels correlate with UVB irradiance but also that vitamin D levels show no evidence of plateauing as UVB irradiance reaches its highest local levels, suggesting that

adaptations to seasonal variations in UVB irradiance may be emerging in zoo chimpanzees in France and other mid-latitude countries.

averaged across seasons, vitamin D levels in zoo chimpanzees in mid-latitude countries such as France tend to be comparable to those in wild chimpanzees in tropical countries such as Tanzania.

providing supplemental vitamin D to chimpanzees in zoos in France and other mid-latitude countries would likely not be beneficial.

zoo chimpanzees in France and other mid-latitude countries could likely synthesize more vitamin D if they were exposed to higher levels of UVB irradiance.