What is the name of an igneous rock with a phaneritic texture and ultramafic composition?

11 points! omg plz plz plz ! i really need it! only answer if you know what it is which is a major problem with africa's export economy? a. african businesses have to compete with each other b. raw materials earn less profit than finished goods. c. export economies lead to quick industrialization d. africa relies too much on import tariffs