North American gray wolves usually have mixed gray and white fur, but some members of the species have a version of a gene, or gene variant, that gives them a mostly black coat instead. Sarah Cubaynes and her team studied twelve populations of North American gray wolves. They found that the black-furred wolves are more common in areas where outbreaks of distemper virus happen regularly. The team also discovered that the black-furred wolves are more likely to be immune to distemper than the gray-furred wolves are. Taken together, these findings suggest that ______
Which choice most logically completes the text?
Choose 1 answer:
Choose 1 answer:
(Choice A) gray-furred wolves will soon replace black-furred wolves across North America.
A
gray-furred wolves will soon replace black-furred wolves across North America.
(Choice B) the gene variant that results in black fur may be linked to immunity to the distemper virus.
B
the gene variant that results in black fur may be linked to immunity to the distemper virus.
(Choice C) North American gray wolves experience more outbreaks of distemper virus than other wolf species do.
C
North American gray wolves experience more outbreaks of distemper virus than other wolf species do.
(Choice D) the average life span of gray wolves is likely to increase over time because of a particular gene variant.
D
the average life span of gray wolves is likely to increase over time because of a particular gene variant.