(I): The philosopher's lecture lingered amidst the echo of abstraction
Grammatically correct: The phrase follows the verb naturally.
Contextually apt: Philosophy often deals with abstract thought, and the phrase "echo of abstraction" poetically reflects the lingering, vague impact.
(II): The artist's work seemed to emerge amidst the echo of abstraction
Grammatically correct: The phrase logically follows "emerge."
Contextually fitting: Abstract art is common, and "emerging amidst abstraction" fits the idea of undefined or interpretive work.
(III): The journalist reported the political developments amidst the echo of abstraction
Grammatically possible, but contextually incorrect: Journalism demands clarity and specificity, not abstraction. The phrase contradicts the focus on "empirical data."
Hence, option (c) is the correct answer.