What does this diagram show?
a) All three species share a common ancestor, but the African elephant and Sumatran tiger are more closely related to each other than they are to the Norway rat.
b) All three species share a common ancestor, but the Sumatran tiger and Norway rat are more closely related to each other than they are to the African elephant.
c) The Sumatran tiger, African elephant, and Norway rat are not related and come from separate lines of evolutionary history.
d) All three species share a common ancestor and are equally related to each other.

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