Answer:
Juxtaposition
Step-by-step explanation:
The literary device used here in "They were allowed to choose Between good and evil…" is called Juxtaposition.
Juxtaposition is a literary device that places two opposite word side by side.
This is usually done to highlight the comparison and contrast between them.
In the given line above, the words good and evil are two opposite words that have been placed in the same sentence to highlight their similarities and differences.