Which statement best describes nonpoint pollution, originating from many diffuse sources rather than a single outlet?

• A. Rain washes pollutants into surface water
• B. Nitrate Standards
• C. Examples of Point Sources
• D. Pollution from broad, diffuse areas

Answer: (D)

Nonpoint pollution arises from many diffuse sources rather than a single outlet. It typically happens when rainfall or snowmelt runs over large areas—yards, fields, roads—picking up pollutants and carrying them into streams and lakes. The best description among the options is Pollution from broad, diffuse areas, because it directly conveys the idea of multiple sources spread across the landscape contributing contaminants to water bodies. The other options don't capture that pattern: rain washing pollutants into surface water describes the process rather than the diffuse-source nature; nitrate standards are regulatory targets, not a description of the source; and examples of point sources point to a single discharge, which is the opposite of nonpoint pollution.