A nurse is performing a physical assessment for a preschooler. Which of the following actions should the nurse take?

The correct answer is C: Check visual acuity by using the tumbling E eyechart. This is the appropriate action for a preschooler as they may not yet be able to read standard eye charts. By using the tumbling E chart, which consists of capital E letters facing in different directions, the nurse can assess the child's visual acuity effectively. Auscultating the abdomen for an extended period (choice A) is unnecessary and not relevant to a preschooler's physical assessment. Using the bell stethoscope for breath sounds (choice B) is not appropriate for assessing a preschooler. Placing a hand on the abdomen to determine respiratory rate (choice D) is also not a recommended method for assessing a preschooler.