The recommended children's dosage of Keflex is 25 to 50 mg/kg/day in divided doses. The maximum daily safe dosage for a child weighing 42 lb is: Round to the nearest tenth.

(Number Only, do not enter mg, kg, or day with your answer)

The correct answer is choice C. The child needs opportunities to play with peers.

Choice A rationale:

While it's important for children with congenital heart disease to understand their limitations, it's not the primary concern in this scenario. Allowing the child to interact and play with peers is essential for their social, emotional, and psychological development.

Choice B rationale:

While parents play a crucial role in a child's care, completely isolating the child from peers is not ideal. Overprotectiveness can lead to social isolation and hinder the child's ability to develop important social skills.

Choice C rationale:

Children with congenital heart disease should be encouraged to engage in age-appropriate physical activities and play with peers. Of course, the level of activity should be discussed with the child's healthcare provider, but limiting the child's interactions could have negative consequences on their overall development and emotional well-being.

Choice D rationale:

While supervision is important for any child's safety, constant parental supervision to avoid overexertion might not be necessary or feasible. Educating the child about their limitations and providing opportunities for play while monitoring their comfort level is a more balanced approach.

The correct answer is choice A, E.

Choice A rationale:

Using an air conditioner is an effective way to reduce exposure to pollens and dust. Air conditioners filter the air and help prevent outdoor allergens from entering the indoor environment. This choice is correct because it addresses one of the primary sources of exposure to allergens.

Choice B rationale:

Keeping humidity in the house above 60% is not a recommended approach. High humidity can promote the growth of mold and dust mites, which can exacerbate allergies. Maintaining humidity levels between 30-50% is generally recommended for reducing allergen exposure.

Choice C rationale:

Keeping pets outside might seem like a logical option to reduce allergen exposure; however, pet allergens can still be carried indoors on clothing and shoes. Moreover, if individuals are not allergic to pet dander, keeping the pets inside may not pose an issue.

Choice D rationale:

Replacing wall-to-wall carpeting with wood and tile floors is a good strategy for reducing allergen exposure. Carpets can trap dust, pollen, and other allergens, while hard surfaces are easier to clean and do not accumulate allergens as readily. This choice is correct because it addresses a common source of indoor allergens.

Choice E rationale:

Putting dust-proof covers on pillows and mattresses is another effective strategy for reducing allergen exposure. These covers create a barrier that prevents dust mites and their allergens from permeating the sleeping environment. This choice is correct because it directly addresses the issue of dust mite allergens.