Answer:
(A.) It was the site of a massacre of Lakota Sioux by US troops in 1890.
EDGE2020
C. rare and costly dark stone
Answer:
Islam spread into Ghana mainly because of trade exchanges.
Explanation:
Islam spread into Ghana mainly because of trade exchanges, from neighboring countries and states , such as Borno and Hausa traders from North-East, and Mandens from North-Western borders of Ghana.