Final answer:
Intravenous administration would have the fastest delivery to the bloodstream.
Step-by-step explanation:
Of the given options, intravenous would have the fastest delivery to the bloodstream. Intravenous administration involves directly injecting the medication into a vein, which allows for immediate absorption into the bloodstream. This method bypasses the gastrointestinal tract and any potential barriers to absorption, resulting in rapid onset of action.