Answer:
The correct answer is option D, that is, it can be mass produced.
Explanation:
The synthetic materials are also called man-made substances, they do not occur naturally, and would comprise the majority of the composite substances like Kevlar, fiberglass, carbon fiber composites, some of the metallurgical alloys, and plastics. This would not comprise natural fibers like silk, cotton, hemp, and other naturally occurring composites.
The prime benefit of synthetic materials is that it can be generated massively in industries or in labs.