I think what is meant here is the fact that the borders of African countries are unusually straight and do not follow natural landscapes (see the borders between Namibia and Botswana) - this is a legacy of how the land was shared by the colonial powers.
Muhammad first received revelations in 609 CE in a cave on Mount Hira, near Mecca.
It could be B.........................
True, Mary Magdalene thought the risen Jesus was a gardener