Final answer:
The client should rinse their mouth after using the Azmacort (triamcinolone) inhaler.
Step-by-step explanation:
The correct statement that would indicate that the teaching was effective concerning the use of the Azmacort (triamcinolone) inhaler is B) "I should rinse my mouth after using the inhaler."
Rinsing the mouth after using the inhaler is important because it helps to prevent the build-up of the medication on the mouth and throat, which can lead to side effects such as oral thrush. By rinsing after each use, the client can minimize the risk of developing these side effects. This demonstrates that the client understands and remembers this important instruction.