Option 3: (B), (A), (D), (C) -> This arrangement creates a grammatically correct and logically flowing sentence: "Artificial intelligence is revolutionising various industries by automating repetitive tasks, analysing vast amounts of data and improving decision-making processes, which is also raising concerns about ethics and job displacement." The sentence begins with the main subject and verb (B), explains how AI is revolutionizing through methods (A), continues with additional methods (D), and concludes with the contrasting consequence using "which" as a connector (C). -> correct