Scientists have studied oceanic plastic garbage "patches" around the world. These are areas that accumulate plastic garbage from coastal regions. Their environmental effect ranges from killing sea life to blocking sunlight from reaching photosynthetic organisms. Without a change in human plastic usage, new garbage patches will continue to form. Which human activity would most directly reduce the amount of plastic garbage that enters the ocean?

a. Ban the production and usage of all bags made from recycled plastic.
b. Clean up plastic trash from shorelines, rivers, and other waterways that fl ow into the oceans.
c. Manufacture fewer reusable water bottles, so that people will be more likely to use disposable ones.
d. Implement a glass bottle deposit system to discourage people from recycling plastic bottles.