Answer:
Option 2
Explanation:
<--> symbol means you must interchange (swap) Row 1 and Row 2. This means you must switch the two rows where row 1 (-1 1 2 | 7) takes place of row 2 (-3 2 1 | 4) and vice versa.
Improved classical language skills, the promotion of mathematics, and the development of the printing press, telescope, microscope, etc. Served as the foundation of the Scientific Revolution.
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