Answer:
a.intravenously
Step-by-step explanation:
Intravenous is a method of administering concentrated medications (diluted or undiluted) directly into the vein using a syringe through a needle less port on an existing IV line or a saline lock.
Administering a medication intravenously eliminates the process of drug absorption and breakdown by directly depositing it into the blood. This results in the immediate elevation of serum levels and high concentration in vital organs, such as the heart, brain, and kidneys.