Correct Answer: B

Rationale: Symbolic play, or imaginative play, is a hallmark of Piaget's preoperational stage, which occurs from about ages 2 to 7. A 3-year-old engages in pretend play, demonstrating their ability to represent objects and actions symbolically.

Correct Answer: A

Rationale: Vitamin D supplementation is recommended for exclusively breastfed infants due to limited amounts in breast milk. Iron supplementation is also recommended after 4-6 months to prevent anemia.

Correct Answer: C

Rationale: Tuna fish is a good source of iron, as well as providing protein and omega-3 fatty acids, making it a suitable recommendation for increasing iron in the child's diet.

Correct Answer: A,B,D,F

Rationale: A: Believing in imaginary friends or creatures is a typical example of magical thinking, as preschoolers often create fantasy scenarios. B: Fears of monsters or ghosts also reflect magical thinking, where children believe that thoughts or imaginations can bring about real consequences. D: Believing that their thoughts can cause something to happen is a hallmark of magical thinking, as preschoolers often think their ideas can influence reality. F: Believing that their actions can change the outcome of events is another example of magical thinking, where children feel their behaviors have magical or direct effects on situations.

Correct Answer: A

Rationale: A 3-year-old has a limited understanding of time, so referencing an event like 'after dinner' is more appropriate and meaningful to the child.