What is the main idea of this selection?
A Diamonds have been prized for thousands of years, but violence in the diamond trade is a serious problem.
B Until recent times, diamonds were so rare that only kings and queens could afford to own them.
C Even experts and geologists do not really understand how diamonds are formed.
D Diamonds are used primarily in crowns and tiaras worn by members of royal families.
What is the main idea of this selection
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The correct answer is A Diamonds have been prized for thousands of years, but violence in the diamond trade is a serious problem.
Explanation: This option captures the main idea by highlighting the historical value of diamonds while addressing the significant issue of violence associated with their trade. It sets the stage for discussing both the admiration for diamonds and the darker aspects of their acquisition, indicating a conflict that affects the diamond industry.