What common characteristic distinguishes acne vulgaris?

Acne vulgaris is characterized by the presence of a variety of lesion types, including papules, pustules, and comedones. This condition results from the clogging of hair follicles with oil and dead skin cells, leading to inflammation. The combination of different lesion types is a hallmark of acne vulgaris, as it can present differently depending on the severity and stage of the acne. Papules are small raised bumps, pustules are similar but filled with pus, and closed comedones are clogged pores that appear as small flesh-colored or white bumps.

The involvement of multiple lesion types reflects the multifaceted nature of acne vulgaris, making option C the correct response. Understanding this diversity in presentation is crucial for proper diagnosis and treatment, as it indicates the underlying process of acne and helps guide effective management strategies.