Final answer:
The nurse's initial response should be to acknowledge the teenager's fear and offer support and reassurance.
Step-by-step explanation:
The nurse's initial response should be to acknowledge the teenager's fear and offer support and reassurance. Option 3, "You sound worried; let me make arrangements to have you examined," is the most appropriate response. This response validates the teenager's concerns and shows empathy towards their situation. The nurse can then proceed to gather a health history and arrange for an examination if necessary.