A. Covering the scale with a clean sheet of paper is unnecessary and does not affect the accuracy of the weight or length measurement. B. Measuring the infant's length from the crown of the head to the heels of the feet is the correct method for obtaining length measurements in infants. C. Placing a stadiometer on the top of the infant's head is incorrect; the measurement should be taken from head to heel. D. Ensuring the scale is balanced to "0" before weighing the infant is essential for obtaining an accurate weight measurement. E. Obtaining the infant's weight with their diaper on may add unnecessary weight, potentially affecting the accuracy of the weight measurement.