Option 4: (C), (B), (D), (A) -> Forms a logical sentence: "The processing method of extracting hemp fibers from sun-drying plants to the final spinning of yarn is a long and tedious manual process; hence it is mainly worn during festivals and ceremonial events" - shows cause and effect relationship. -> correct
Hence, Option 4: (C), (B), (D), (A) -> The sentence starts with the subject (processing method), describes the process (extracting hemp fibers through sun-drying and spinning), establishes it as tedious, and concludes with the consequence (worn only during special occasions). The "hence" creates a logical bridge between the labor-intensive process and its limited ceremonial use. -> correct