Các thành tựu văn hóa cận đại thế kỉ XIX-XX phát triển ở đâu

How do conflict minerals, and in particular, conflict coltan get their name? what groups benefited from the trade in conflict minerals? what group were hurt by it?

Sole i will mark brainlist to who answer

At the time of hitler's 1939 invasion of poland, the us had a policy of appeasement negotiation opposition neutrality