The transcription regulator AIRE (autoimmune regulator) plays a key role in developing immunological self-tolerance by promoting the production of various cellular proteins that are mainly expressed outside the thymus. Which of the following cells have the highest level of AIRE?
A) Double-negative thymocytes B) Double-positive thymocytes C) Lymphoid follicle cells in lymph nodes D) Thymus epithelial cells E) Peyer's patch cells