Choice A rationale:

 Cellulitis occurs when the skin's protective barrier is compromised.

Cellulitis is a bacterial skin infection that occurs when bacteria enter the skin through a break or opening in the protective barrier, such as a cut, wound, or insect bite.

The bacteria then multiply in the underlying tissues, leading to inflammation, redness, warmth, swelling, and pain.

Choice A is correct because it accurately describes the pathophysiology of cellulitis, emphasizing the importance of a compromised skin barrier in its development.

Choice B rationale:

 Cellulitis is primarily caused by a viral infection.

This statement is incorrect.

Cellulitis is primarily caused by bacterial infections, commonly by Streptococcus and Staphylococcus species.

Viruses do not typically cause cellulitis.

Choice C rationale:

 Cellulitis leads to increased blood clot formation.

This statement is incorrect.

Cellulitis does not lead to increased blood clot formation.

Instead, it causes inflammation and infection in the skin and underlying tissues.

Choice D rationale:

 Cellulitis results in excessive sweating in the affected area.

This statement is incorrect.

Cellulitis does not result in excessive sweating.

It causes localized symptoms such as redness, warmth, swelling, and pain, but sweating is not a characteristic feature of cellulitis.