Which of the following statements is true regarding the African range of Homo erectus?
A) H. erectus specialized in the woodland forests of East Africa. B) By 1.8 Ma, H. erectus had extended its range to the most northern and southern parts of Africa. C) H. erectus could not colonize the high-altitude plateaus of Ethiopia or use the dry edges of the Rift Valley. D) This species' range encompassed almost the entire continent, which means that it was adapted to a broad range of environmental conditions.