Which of the Following Statements Is True Concerning Direct Radiography

Which of the following statements is true concerning direct radiography (DR) systems?

A) Use storage phosphors to temporarily store energy representing the image signal.
B) Require that the storage phosphor undergoes a process to extract the latent image.
C) Have detectors that directly capture and read out an electronic image signal.
D) Use storage phosphors to temporarily store energy representing the image signal and require that the storage phosphor undergoes a process to extract the latent image.