What Does the Term "Detailing" Mean in the Pharmaceutical Industry

What does the term "detailing" mean in the pharmaceutical industry?

A) An exceptionally thorough cleaning, washing and precise coating process at the final stages of the production of each batch of pills, which will favorably show off all the details of the pill.
B) Detailing involves a representative of the pharmaceutical firm calling on an individual physician to set up a meeting, where the representative will discuss one or two products with the physician.
C) The process of developing a pill design (shape, color, engraving, and other artistic and decorative details) .
D) Careful attention to every detail of the drug manufacturing process.
E) The requirement to the drug manufacturers to include the details of the drug side effects in journal and TV advertisements.