text: A 33-year-old male underwent an acute total thyroidectomy for thyroid cancer. During the operation, moderate bleeding occurred in several blood vessels in the left part of the neck, requiring suturing. Postoperative plasma test results showed that the calcium level was 7.5 mg/dl, the albumin level was 4 g/dl, and the parathyroid hormone (PTH) level was 200 mg/ml. Which of the following blood vessel damage correlates with the test results in this patient?
  
  a. branches of the cervical artery
  b. branches of the external carotid artery
  c. branches of the thyroid carotid artery
  d. tributary of the internal jugular vein