Which of the Following Is True of Scattered Radiation

Which of the following is true of scattered radiation?

A) It is produced when the x-ray beams interact with the air prior to striking the patient and results in significant image fog.
B) It can be prevented by reducing the exposure field, increasing tissue thickness, and using faster screens.
C) It may result in an increase in image contrast that reduces the unsharpness of the image.
D) It is most easily controlled by using collimation and a grid.