Choice A rationale:

 "I have blisters all over the area." This statement does not indicate an understanding of the clinical presentation of cellulitis.

Blisters are not a typical symptom of cellulitis.

Cellulitis is characterized by redness, warmth, swelling, and pain, but blisters are more commonly associated with conditions like burns or herpes.

Choice B rationale:

 "My skin feels cool to the touch." This statement is not indicative of an understanding of cellulitis.

In cellulitis, the affected area typically feels warm due to inflammation, not cool.

Choice C rationale:

 "There is no change in the color of my skin." This statement suggests a lack of understanding of cellulitis.

One of the hallmark signs of cellulitis is a change in skin color, often appearing red or erythematous, in the affected area.

Choice D rationale:

 "The area is red, swollen, and painful." This statement correctly indicates an understanding of the clinical presentation of cellulitis.

Cellulitis is characterized by these classic symptoms: redness, warmth, swelling, and pain.