A nurse is teaching a prenatal class about infection prevention at a community center. Which of the following statements by a client indicates an understanding of the teaching?

Rationale: A. Pregnant clients should avoid cleaning cat litter boxes due to the risk of Toxoplasma gondii, a parasite that can cause serious congenital infection. If no one else can perform the task, gloves and strict hand hygiene are required, but ideally exposure should be avoided. B. Proper hand hygiene requires washing hands for at least 20 seconds using soap and clean running water. Additionally, “hot water” is not required—lukewarm or cool water is appropriate. Gardening can expose clients to soil-borne organisms, so thorough handwashing is important, but the duration and technique stated are inaccurate. C. Varicella-zoster virus (chickenpox) is contagious until all lesions have crusted over. Once lesions are fully crusted, the infected individual is no longer considered contagious, and exposure risk is significantly reduced. Therefore, visiting after crusting indicates understanding of infection control precautions. D. Antibiotics are ineffective against viral infections. Taking antibiotics for viral illnesses contributes to antibiotic resistance and unnecessary medication exposure. Viral infections should be managed with supportive care unless a secondary bacterial infection is diagnosed.