About three-fourths of world's cobalt, a metal required for the manufacture of batteries for electric motor vehicles, is produced by

1. A

   Argentina

   Argentina. Lithium and copper stories, not three-fourths of cobalt.

2. B

   Botswana

   Botswana. Diamonds; not the cobalt giant.

3. C

   The Democratic Republic of the Congo

   The Democratic Republic of the Congo. About three-quarters of mined cobalt.

4. D

   Kazakhstan

   Kazakhstan. Uranium and other metals, not this cobalt share.

Summary. Official key is (c) the DRC. Artisanal and industrial mines in Katanga supply most of the world’s cobalt, the metal that stabilises many lithium-ion cathodes. Argentina, Botswana and Kazakhstan are the wrong mineral maps.