Option 2: (D), (B), (A), (C) -> Forms the grammatically correct and meaningful sentence: "Artificial intelligence is revolutionizing various industries, enhancing efficiency and enabling new innovations that were once thought impossible."
Option 1: (A), (D), (B), (C) -> Starts with "and enabling" which cannot begin a sentence and creates a fragmented structure.
Option 3: (B), (A), (D), (C) -> Begins with "various industries" without a subject, making it incomplete and grammatically incorrect.
Option 4: (C), (B), (D), (A) -> Starts with "were once thought impossible" which lacks a subject and creates a nonsensical sequence.
Hence, Option 2: (D), (B), (A), (C) -> The sentence flows logically with (D) establishing the subject and main verb, (B) introducing the object with a participial phrase, (A) continuing with another participial phrase using "and," and (C) completing the relative clause started by "that" in part (A) -> correct