When there is a heavy rain trees can help to prevent floods as they can ______ A. k

When there is a heavy rain, trees can help to prevent floods, as they can ______

A. keep rain from falling down to soft ground

B. cause the soil to allow rainwater to sink in

C. make the topsoil stick together

D. prevent the soil from being washed away

请帮忙给出正确答案和分析，谢谢！