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?

A. Varicella (chickenpox) is no longer contagious once all lesions have crusted over, which typically happens 5 to 7 days after rash onset. Pregnant individuals should avoid exposure to active chickenpox due to the risk of congenital varicella syndrome. B. Handwashing is crucial, but it should be done for at least 20 seconds with warm (not hot) water. C. Antibiotics do not treat viral infections and should not be taken unnecessarily. D. Pregnant individuals should avoid cleaning a cat’s litter box due to the risk of toxoplasmosis, which can harm the fetus.