The Center for Disease Control (CDC) has its own laboratories and national wastewater surveillance system to help local health departments with wastewater collection and testing. Why does the CDC have a wastewater surveillance system? - Wastewater can be treated to prevent viral spread in drinking water.

- Wastewater can be collected, tested, and used to trace viral outbreaks.

- Viral outbreaks are spread through wastewater treatment of drinking water.

- Wastewater can go through ozonation and chlorination to prevent virus spread.

starchy vegetables are high in carbohydrates.

starchy vegetables contain more carbohydrates than non-starchy vegetables.

explanation:

there are two primary categories of carbohydrates, essentially differentiated on the basis of their carbohydrate content (which is in the form of starch - a complex carbohydrate):

those vegetables which contain little amounts of starch are termed as non-starchy vegetables, and some examples include: artichokes, broccoli and bean sprouts.

vegetables high in their starch content are distinguished as starchy vegetables, and some examples include: potatoes, chickpeas and corn.

i think the answer would be d

its b. greenhouse gasses trap uv rays for heat so that the plants stay alive.