Answer: Some other examples of literary tone are: airy, comic, condescending, facetious, funny, heavy, intimate, ironic, light, modest, playful, sad, serious, sinister, solemn, somber, and threatening
Explanation:
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.
B. All Labrador retrievers love the water.
I believe The answer is A.