MCQOPTIONS
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| 1. |
A study has found that the use of Bitcoin, a popular virtual currency, emits over ________ megatonnes of carbon dioxide annually. |
| A. | 12 |
| B. | 16 |
| C. | 22 |
| D. | 28 |
| E. | 32 |
| Answer» D. 28 | |