Everyday Science
NULL
Medium
Question
If black gold is oil, “black diamond” refers to __________?
A
Copper
B
Iron
C
Coal
✓ Official correct answer
D
Wood
Community credibility
Registered members can vote for the answer they believe is correct today and explain why. If the facts change after an election or news event, suggest a new option so others can vote it up.
A
Copper
No member explanations yet for this option.
B
Iron
No member explanations yet for this option.
C
Coal
No member explanations yet for this option.
D
Wood
No member explanations yet for this option.
Explanation
“Black diamond” is a nickname for coal.
Hence the keyed answer is Coal.
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