The majority of the central part of africa (majority of the congo basin) has between inches of annual precipitation.

Answer accretion;

C.over 1 million refugees were displaced.

If a particular resource is not useful or needed then the price would be considerably low. once that resource is needed the price or value will raise depending on how useful or needed it is especially if the resource is low in quantity, the consumers would pay whatever they have to, to get that material.