When drugs are mixed and dissolved into a solution and administered by a slow drip into a vein, the administration is known by which of the following terms?

A) Injection
B) Hydration
C) Infusion
D) Installation
E) Absorption

Infusion

A slow drip, as of an intravenous solution into a vein.

Injection

The act of administering a liquid, especially a drug, into a body part, typically using a syringe and needle, for therapeutic reasons.

Absorption

The process by which one substance is absorbed, or taken in and incorporated, into another, as when the body converts food or drugs into a form it can use.