Final answer:
Digital radiography offers greater contrast resolution as one of its advantages over film, among other benefits such as lower radiation doses and the elimination of processing chemicals.
Step-by-step explanation:
One of the advantages of digital radiography over film is B) Greater contrast resolution. Digital radiography provides several benefits compared to traditional film-based systems. Unlike film radiography, digital radiography typically requires lower radiation doses due to more sensitive detectors and the ability to manipulate images after they are taken to get the best diagnostic quality. This reduces the patient's exposure to radiation, which with film could be a contributing factor to increased cancer risks if used frequently or improperly. Furthermore, digital systems do not require the use of processing chemicals, challenging the option that implies a greater need for them. As for longer exposure times, digital radiography actually benefits from often having shorter exposure times than traditional film, reducing the radiation dose even further.