A 23-year-old patient complains of "stuffed ears"and decreased hearing acuity. The symptoms appeared when the patient was suffering from inflammation of the tubal tonsils. Objectively, mucosal edema is observed in the anatomical structure that ensures the balance of the air pressure on both sides of the eardrum and connects the tympanic cavity with the nasopharynx. Name the bony part of this anatomical structure.

• A. Canaliculus chordae tympani
• B. Semicanalis tubae auditivae
• C. Semicanalis tensoris tympani
• D. Canalis caroticus
• E. Canaliculus mastoideus