Final answer:
The best route for administering dopamine to treat a systemic infection is via intravenous administration.
Step-by-step explanation:
The best route for administration of dopamine depends on the specific situation and the desired effects of the medication. However, for the purpose of treating a systemic infection, the most appropriate and convenient route would be via intravenous administration (option B).
Intravenous administration allows for a more rapid onset of action and direct delivery of the medication into the bloodstream, bypassing absorption processes in the gastrointestinal tract. This is particularly important when a chosen drug is not absorbed well in the GI tract. Additionally, intravenous administration can achieve higher plasma levels compared to other routes, which is beneficial when treating an infection.
It is important to note that the specific dosage and administration of dopamine should be determined by a healthcare professional based on the individual patient's condition and needs.