The tone of the passage has been Curious. Thus, option A is correct.
The given lines are from "Ode on a Grecian Urn", written by Jon Keats in 1819. The poem has been based on the relationship between art, beauty, and truth. He delivers the idea that the real beauty of mankind has existed in the truth.
The line "Who are these coming to the sacrifice?" has been from the fourth stanza. The author has been asking about the people who are gathering for witnessing the sacrifice of animals.
Stanza IV has been further followed by the lines, that deliver that priest has been taking the cow to the alter. The speaker has been curious to learn about the alter where he has been taking the cow.
The cow has also been curiously depicted by the moaning by looking at the sky. Thus, the tone of the passage has been curious. Thus, option A is correct.
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