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Some epidemiologists believe that the Ebola virus originally has emerged from an animal host in less populated regions of Africa where there is more frequent contact between humans and wild animals.
A. has emerged from an animal host in less populated regions of Africa where there is more frequent contact
B. was emerging from an animal host in a sparsely populated region of Africa where there is contact more frequent
C. emerged from an animal host where there is more frequent contact in a sparsely populated region of Africa
D. emerged from an animal host in less populated regions of Africa where there is more frequent contact
E. was emerging in a sparsely populated region of Africa from an animal host where there is more frequent contact
A. has emerged from an animal host in less populated regions of Africa where there is more frequent contact
B. was emerging from an animal host in a sparsely populated region of Africa where there is contact more frequent
C. emerged from an animal host where there is more frequent contact in a sparsely populated region of Africa
D. emerged from an animal host in less populated regions of Africa where there is more frequent contact
E. was emerging in a sparsely populated region of Africa from an animal host where there is more frequent contact
