What information does the physician's desk reference contain? a. a list of prescription medications that can be bought in the united states and containing the same information as the package insert of each medication b. a list of medications that were available in the united states but were found to have too many adverse reactions and therefore retracted c. a list of medications that u. s. manufacturers are developing and testing. d. a list of licensed physicians in the united states as well as their modalities and contact details