SAT English Practice Question

The following passage discusses the environmental impact of the use of plastic. Plastic has been an essential part of life for decades. It is cheap, versatile, and durable, but it is also a major source of pollution. Most plastic waste ends up in landfills, where it can take hundreds of years to decompose. Plastic waste also ends up in oceans, harming marine life. Even though plastic is a valuable material, we must dispose of it properly to reduce its environmental impact. Which choice best describes the main idea of the passage?

1. A.the use of plastic in modern society.
2. B.the harmful effects of plastic pollution.
3. C.the potential benefits of plastic.
4. D.the process of recycling plastic.