Answer:
The correct answer is C. The East African Rift has volcanoes along it because asthenosphere is rising under the rift and supplying heat.
Explanation:
The East African Rift is a rift in East Africa, developing from the Miocene 22-25 million years ago. It was formerly considered to be part of the largest Rift Valley extending into Asia Minor.
The rift is a narrow zone of tectonic plate divergence, in which the African plate is in the process of dividing into two, called Somali plate and Nubian plate, at a rate of about 6–7 mm per year.
As a result of the movement of plate tectonics, a large amount of energy is released from the rift edges. These portions of land gather together forming mountains, and because of the energy and heat that tectonic movement causes, the mountains end up forming like volcanoes.
