<em>Environmental service systems pathway includes occupations involved in water and air pollution control, recycling, waste disposal and public health issues. Work includes hazardous-waste management, research, and quality control.</em>
The answer is C. That's all
Do you need the definition of them?
Answer by JKismyhusbandbae: D) can cause tumors or cancer.
Explanation: Stimulants are drugs that elevate the mood, increase feelings of well-being, and increase energy. They affect the nervous system by increasing its’ activity and can cause cancer.