Which of the following is true of salt-affected soils

Which of the following is true of of salt-affected soils?

Group of answer choices

A. Sodic soils generally have the lowest pH

B. Sodic soils generally have the highest EC levels

C. The pH of saline soils is almost always above 9.0

D. Sodic soils can be accidentally formed by leaching a saline-sodic soil with high quality irrigation water.