Land Drainage Is Beneficial Because _____

Land drainage is beneficial because _____.

A) it increases the alternate of expansion and contraction due to freezing and thawing of soils
B) it increases the water-to-air ratio in the soil pores
C) it slows down the rate of soil warming in the spring
D) it increases the depth of root penetration in the soil
E) it increases the availability of iron and manganese in acid soils