Answer:
"I need to shake the inhaler well before taking the medication."
Explanation:
One of the main recommendations for using an inhaler is to shake it before use. So this sentence is the one that indicates that the client has understood the indications given by the nurse.
As for the other options, it is advisable to wait 1 minute before another inhalation, not 30 minutes.
And taking a deep breath before inhalingit is also not correct, because it is advisable to exhale (empty the lungs) before using the inhaler so that the medication fills the lungs
