The best title of this passage can be: ______.A．Ethiopians and HemoglobinB．Ethiopians and

The best title of this passage can be: ______.

A．Ethiopians and Hemoglobin

B．Ethiopians and the World-class Athletes

C．An Anthropological Study on Ethiopians

D．A Myth. Hemoglobin and the World-class Athletes among the Ethiopians