Common causes of adverse effects of drugs are all of the following except which statement?
A. Cumulative effects when the inactivation or excretion of the drug is slower than the rate at which the drug is administered
B. Hypersensitivity or allergic reaction to a drug acquired only after a re-exposure to the drug
C. Synergistic reaction by enhancing the effect of a prior or concurrent administration of another drug.
D. There is an error made in the drug prescription