Depending on the phylogenetic tree, the two species that are most closely related are option c. Angus cattle and white-tailed deer.
Relation of two species:
Angus cattle and white-tailed deer should be considered as the two species as these are closely related since it should both be taxa species that represent the close relationship in the phylogenetic tree.
Also, phgmy hippotamus and while tail dear should be less closely related as compared to the option c.
Hence, the option c is correct.
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