A 4 year old child presents with varicella and vesicular rash in various stages of healing. Which statement by the parent indicates understanding of the teaching?

A. Ibuprofen can be used for fever, but it is important to check if the child has varicella before administering due to potential Reye's syndrome. B. The child should stay home until all lesions have crusted over to prevent spreading the virus, even if the fever is gone. C. Once lesions have crusted, the child is no longer contagious, indicating understanding of the contagious period. D. Using cool or tepid water is acceptable for soothing itching; however, it does not specifically address the need for proper care during the contagious phase.