Option 1 -> Breaks the phrase "rapid pace" by placing (D) between (C) and (B), creating an illogical flow.
Option 2 -> Starts with "encryption" without introducing the subject (quantum computing), making the sentence incomplete and confusing.
Option 3 -> Creates proper flow: "Quantum computing is advancing at a rapid pace, promising unprecedented processing power for calculations, enabling breakthroughs in science and data encryption, shaping the future of computing and technology."
Option 4 -> Begins with "for calculations" without establishing context, and ends abruptly with incomplete phrase "at a rapid."
Hence, Option 3: (C), (B), (D), (A) -> This sequence logically connects all parts: (C) introduces the subject and starts "rapid," (B) completes it with "pace" and adds the promise, (D) specifies the application area, and (A) concludes with the broader impact -> correct