Why are erosion and sediment control BMPs critical during construction, and name two effective measures.

• A. They are optional; measures: fertilizer and mulch.
• B. They prevent sediment pollution and turbidity in waterways; measures include silt fences and sediment basins (or check dams, vegetation) to trap sediment.
• C. They only affect aesthetics; measures: paint and signage.
• D. They are used to control dust; measures: water trucks and tarps.

Answer: (B)