Which of the following best describes the characteristic appearance of lesions of human papillomavirus (HPV)?

The correct answer is A: Elevated growths with a 'cauliflower' appearance. HPV lesions typically present as raised, rough, and cauliflower-like growths due to hyperkeratosis and acanthosis. This characteristic appearance is caused by the viral infection altering the normal keratinization process. Option B is incorrect as it describes a different type of lesion commonly seen in basal cell carcinoma known as a "rodent ulcer." Option C is incorrect as it describes impetigo, a bacterial infection. Option D is incorrect as it describes herpes simplex virus lesions.