A lake near a large city became polluted due to domestic and industrial waste being released into it. The polluted lake water affected the ecosystem in and around the lake. A group of residents took up an initiative to protect the lake from further pollution. They began a competition among the local residents to design a solution for the problem and to create awareness among the people. Which of these solutions would be the best while making sure economic and social concerns are considered? A. building a treatment plant to treat waste before it is released into the lake B. using eco-friendly products and preventing entry of waste water into the lake C. adding substances to the lake water to dissolve chemical compounds D. cleaning and filtering the lake water regularly using proper equipment