Question: What is this article mainly about?
A. New materials that are safe to eat can cut down plastic waste.
B. Seaweed can take the place of plastic.
C. Microbes may be able to break down plastic waste.
D. Most things made of plastic cannot be recycled and used again.
This question is a reading comprehension question, not a math problem.
Since it does not involve any mathematical expressions or calculations, there are no steps or formulas to show.
Please provide a math-related question for assistance.