Final answer:
Aromatherapy using essential oils may be contraindicated for a client with a history of asthma due to the potential risk of triggering an asthma attack (option c).
Step-by-step explanation:
The essential oils used in aromatherapy can have different effects on individuals, and while they can be beneficial for some, they may be contraindicated for others. In the context of the client scenarios provided, using essential oils for aromatherapy might be contraindicated for a client with a history of asthma.
Aromatherapy typically involves inhaling scents from essential oils, which could potentially trigger asthma attacks in susceptible individuals. While a client with chronic migraines, a client recovering from a broken leg, or a client with a sprained wrist might find aromatherapy beneficial for pain relief or relaxation, it is the client with asthma for whom the nurse should exercise caution and possibly avoid the use of these oils.
Hence, the answer is option c.