What Is the Purpose of Radiographic Beam Filtration

What is the purpose of radiographic beam filtration?

A) To reduce exposure to the patient's skin and superficial tissues by absorbing most of the higher-energy photons from the heterogeneous beam.
B) To reduce exposure to the patient's skin and superficial tissues by absorbing most of the lower-energy photons from the heterogeneous beam.
C) To reduce exposure to the patient's skin and superficial tissues by absorbing all of the higher-energy photons from the homogeneous beam.
D) To reduce exposure to the patient's skin and superficial tissues by removing all the lower-energy photons from the homogeneous beam.