When performing a physical assessment, palpation reveals to the clinic nurse that a client has an enlarged thyroid gland. Which action should the nurse take in response to this finding?

Choice A reason: While iodine deficiency can cause goiter, recommending iodized salt without confirming etiology may be inappropriate or harmful. Choice B reason: Nutrition teaching may be helpful but is not the immediate priority when a structural abnormality is detected. Choice C reason: Delaying evaluation may miss early detection of thyroid dysfunction or nodules. Immediate diagnostic follow-up is warranted. Choice D reason: Laboratory testing (e.g., TSH, T3, T4) is the appropriate next step to assess thyroid function and guide further management.