Answer:
The word "protracted" means lasting longer than expected, or unusually long, so what protracted most clearly means based on the context of the excerpt is how the time period of celestial motion studies must have lasted unusually long.
Answer:
B
Explanation:
I don't know how to explain
D. This suggests that slave owners turn into tyrants.
I am not familiar with this story. Metaphors are comparisons without using the words “like or as”. Such as, “She is prettier than a sunflower”.
