Lice infestations (e.g., head lice) are a public health concern and are best treated by a doctor or public health official using FDA-approved pediculicides or non-chemical methods like combing. TheGeneral Pest Management: Guide for Commercial Applicators - Category 7A(Chapter 7: Lice) notes that lice treatments are typically medical, not structural pest control, and fall outside the scope of Category 7A applicators. Option B (residual pesticide treatment) is not appropriate for lice on humans. Option C (heat treatment) may be used for items like bedding but not directly for lice infestations on people.