Which diagram represents a landscape where fine-grained igneous bedrock is most likely to be found?

Fine grained igneous rocks are formed when molten rock cool relatively quickly so large crystals are unable to form. This rapid cooling can only occur at the surface when lava erupted from volcanoes interacts with the air. Fined grained igneous rocks are called extrusive igneous rocks. Basalt and andesite are examples of such rocks. The diagram or image most likely shows volcanoes or lava flows. 

Answerequatorial guinea,gabon, and western sahara;

Ibelieve its c.  that to me seems like the closest answer