Final answer:
A 3-year-old preschooler is expected to be able to stack blocks, with a typical ability to build a tower nine blocks high. Other skills like tying shoelaces and using 7-word sentences are generally developed later in the preschool years. Therefore, the nurse should expect the child to demonstrate stacking 10 blocks.
Step-by-step explanation:
The developmental milestones that a nurse should expect a 3-year-old preschooler to demonstrate include several cognitive and motor skills that have developed during this stage of growth. At three years of age, a child is expected to exhibit the ability to stack blocks, speak in short sentences, understand and follow simple commands, and engage in pretend play, among other things. Based on the milestones presented in the developmental stages, the most appropriate milestone that a nurse should expect a 3-year-old to demonstrate among the options given would be:
Preschoolers at this age can typically build a tower of blocks nine blocks high, according to developmental standards. While they are approaching the ability to perform the other tasks listed, such as printing a letter, tying shoelaces, and using longer sentences, these are more commonly achieved a little later in the preschool years, around ages 4 to 5.