Read the following sentences from the article.
1) In Kimberley and other abandoned towns, thousands of people search old mines
for diamonds and gold.
2) It also urges people to take over unoccupied land.
3) Like many mining settlements, it was a racially diverse place.
4) The role of Black South Africans in mining history was not often mentioned.
Which two sentences are MAIN ideas from the article?
O 1 and 2
O 1 and 4
O 3 and 4
O 2 and 3
