Final answer:
Magnification is only not beneficial in imaging the entire breast in a single exposure.
Step-by-step explanation:
Magnification is beneficial in all of the following situations except (D) imaging the entire breast in a single exposure. In the other situations mentioned, magnification can help provide a clearer and more detailed image. For example, in (A) imaging the surgical site of a patient undergoing a lumpectomy, magnification can help the surgeon see the area more clearly and identify any abnormalities. In (B) imaging a specimen radiography, magnification can help identify small details or abnormalities in the specimen. And in (C) evaluating microcalcifications in a lesion, magnification can help identify and analyze the calcifications more accurately.