Choice A rationale:

 Encouraging the client to scratch the affected areas to relieve itching temporarily is not an appropriate intervention.

Scratching can exacerbate the symptoms of eczema by damaging the skin further and leading to potential complications, such as infections.

Itching should be managed without scratching.

Choice B rationale:

 This is the correct answer.

Educating the client on the importance of avoiding scratching is a crucial intervention in managing eczema.

Scratching can worsen the condition and lead to skin damage and secondary infections.

Patients with eczema should be encouraged to use alternative methods to relieve itching, such as applying moisturizers, using prescribed medications, or applying cool compresses.

Choice C rationale:

 Applying irritants to the itchy areas to divert the client's attention from scratching is not a recommended intervention.

It may worsen the condition and cause further irritation and discomfort.

The goal is to prevent scratching and manage itching through non-irritating means.

Choice D rationale:

 Recommending frequent and vigorous scratching to remove the crusts is not a suitable intervention.

Scratching should be avoided, as it can lead to skin damage and complications.

Crusts should be managed through appropriate skincare measures and prescribed treatments.