in 105 ce, chinese official cai lun invented a new, more efficient method for creating lightweight paper…

in 105 ce, chinese official cai lun invented a new, more efficient method for creating lightweight paper using plant fibers. ______ people had written on materials like wood or silk, which were either difficult to transport or too expensive for common use. which choice completes the text with the most logical transition? choose 1 answer: a previously, b nevertheless, c therefore, d likewise,
Answer
Brief Explanations:
The text is about Cai Lun's invention in 105 CE. The second part talks about what people did before (using wood or silk). "Previously" indicates the time before Cai Lun's invention. "Nevertheless" shows contrast (no contrast here). "Therefore" shows cause - effect (no such relation). "Likewise" shows similarity (no similarity).
Answer:
A. Previously,