MCQOPTIONS
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| 1. |
In April 2020, astronomers have spotted a record-breaking supernova, the largest ever observed. In which year was the supernova first observed? |
| A. | 2014 |
| B. | 2015 |
| C. | 2016 |
| D. | 2017 |
| E. | 2018 |
| Answer» D. 2017 | |